Commit

18 files changed, 3556 insertions, 0 deletions

diff --git a/src/node_modules/eslint-scope/CHANGELOG.md b/src/node_modules/eslint-scope/CHANGELOG.md
new file mode 100644
index 0000000..cc07de0
--- /dev/null
+++ b/src/node_modules/eslint-scope/CHANGELOG.md
@@ -0,0 +1,70 @@
+v5.1.1 - September 12, 2020
+
+* [`9b528d7`](https://github.com/eslint/eslint-scope/commit/9b528d778c381718c12dabfb7f1c0e0dc6b36e49) Upgrade: esrecurse version to ^4.3.0 (#64) (Timofey Kachalov)
+* [`f758bbc`](https://github.com/eslint/eslint-scope/commit/f758bbc3d49b9b9ea2289a5d6a6bba8dcf2c4903) Chore: fix definiton -> definition typo in comments (#63) (Kevin Kirsche)
+* [`7513734`](https://github.com/eslint/eslint-scope/commit/751373473375b3f2edc4eaf1c8d2763d8435bb72) Chore: move to GitHub Actions (#62) (Kai Cataldo)
+
+v5.1.0 - June 4, 2020
+
+* [`d4a3764`](https://github.com/eslint/eslint-scope/commit/d4a376434b16289c1a428d7e304576e997520873) Update: support new export syntax (#56) (Toru Nagashima)
+
+v5.0.0 - July 20, 2019
+
+* [`e9fa22e`](https://github.com/eslint/eslint-scope/commit/e9fa22ea412c26cf2761fa98af7e715644bdb464) Upgrade: update dependencies after dropping support for Node <8 (#53) (Kai Cataldo)
+* [`ee9f7c1`](https://github.com/eslint/eslint-scope/commit/ee9f7c12721aa195ba7e0e69551f49bfdb479951) Breaking: drop support for Node v6 (#54) (Kai Cataldo)
+
+v4.0.3 - March 15, 2019
+
+* [`299df64`](https://github.com/eslint/eslint-scope/commit/299df64bdafb30b4d9372e4b7af0cf51a3818c4a) Fix: arrow function scope strictness (take 2) (#52) (futpib)
+
+v4.0.2 - March 1, 2019
+
+* [`c925600`](https://github.com/eslint/eslint-scope/commit/c925600a684ae0f71b96f85339437a43b4d50d99) Revert "Fix: Arrow function scope strictness (fixes #49) (#50)" (#51) (Teddy Katz)
+
+v4.0.1 - March 1, 2019
+
+* [`2533966`](https://github.com/eslint/eslint-scope/commit/2533966faf317df5a3847fab937ba462c16808b8) Fix: Arrow function scope strictness (fixes #49) (#50) (futpib)
+* [`0cbeea5`](https://github.com/eslint/eslint-scope/commit/0cbeea51dfb66ab88ea34b0e3b4ad5e6cc210f2f) Chore: add supported Node.js versions to CI (#47) (Kai Cataldo)
+* [`b423057`](https://github.com/eslint/eslint-scope/commit/b42305760638b8edf4667acf1445e450869bd983) Upgrade: eslint-release@1.0.0 (#46) (Teddy Katz)
+
+v4.0.0 - June 21, 2018
+
+
+
+v4.0.0-rc.0 - June 9, 2018
+
+* 3b919b8 Build: Adding rc release script to package.json (#38) (Kevin Partington)
+* 137732a Chore: avoid creating package-lock.json files (#37) (Teddy Katz)
+
+v4.0.0-alpha.0 - April 27, 2018
+
+* 7cc3769 Upgrade: eslint-release ^0.11.1 (#36) (Teddy Katz)
+* c9f6967 Breaking: remove TDZScope (refs eslint/eslint#10245) (#35) (Toru Nagashima)
+* 982a71f Fix: wrong resolution about default parameters (#33) (Toru Nagashima)
+* 57889f1 Docs: Remove extra header line from LICENSE (#32) (Gyandeep Singh)
+
+v3.7.1 - April 12, 2017
+
+* ced6262 Fix: restore previous Scope API exports from escope (#31) (Vitor Balocco)
+* 5c3d966 Fix: Remove and Modify tests that contain invalid ES6 syntax (#29) (Reyad Attiyat)
+
+v3.7.0 - March 17, 2017
+
+* 9e27835 Chore: Add files section to package.json (#24) (Ilya Volodin)
+* 3e4d123 Upgrade: eslint-config-eslint to 4.0.0 (#21) (Teddy Katz)
+* 38c50fb Chore: Rename src to lib and test to tests (#20) (Corbin Uselton)
+* f4cd920 Chore: Remove esprima (#19) (Corbin Uselton)
+* f81fad5 Revert "Chore: Remove esprima" (#18) (James Henry)
+* 31b0085 Chore: Remove es6-map and es6-weakmap as they are included in node4 (#10) (#13) (Corbin Uselton)
+* 12a1ca1 Add Makefile.js and eslint (#15) (Reyad Attiyat)
+* 7d23f8e Chore: Remove es6-map and es6-weakmap as they are included in node4 (#10) (Corbin Uselton)
+* 019441e Chore: Convert to ES6 that is supported on Node 4, commonjs modules and remove Babel (#14) (Corbin Uselton)
+* c647f65 Update: Add check for node.body in referencer (#2) (Corbin Uselton)
+* eb5c9db Remove browserify and jsdoc (#12) (Corbin Uselton)
+* cf38df0 Chore: Update README.md (#3) (James Henry)
+* 8a142ca Chore: Add eslint-release scripts (#6) (James Henry)
+* e60d8cb Chore: Remove unused bower.json (#5) (James Henry)
+* 049c545 Chore: Fix tests for eslint-scope (#4) (James Henry)
+* f026aab Chore: Update package.json for eslint fork (#1) (James Henry)
+* a94d281 Chore: Update license with JSF copyright (Nicholas C. Zakas)
+
diff --git a/src/node_modules/eslint-scope/LICENSE b/src/node_modules/eslint-scope/LICENSE
new file mode 100644
index 0000000..d36a526
--- /dev/null
+++ b/src/node_modules/eslint-scope/LICENSE
@@ -0,0 +1,22 @@
+Copyright JS Foundation and other contributors, https://js.foundation
+Copyright (C) 2012-2013 Yusuke Suzuki (twitter: @Constellation) and other contributors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/node_modules/eslint-scope/README.md b/src/node_modules/eslint-scope/README.md
new file mode 100644
index 0000000..7e7ce0d
--- /dev/null
+++ b/src/node_modules/eslint-scope/README.md
@@ -0,0 +1,54 @@
+# ESLint Scope
+
+ESLint Scope is the [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm) scope analyzer used in ESLint. It is a fork of [escope](http://github.com/estools/escope).
+
+## Usage
+
+Install:
+
+```
+npm i eslint-scope --save
+```
+
+Example:
+
+```js
+var eslintScope = require('eslint-scope');
+var espree = require('espree');
+var estraverse = require('estraverse');
+
+var ast = espree.parse(code);
+var scopeManager = eslintScope.analyze(ast);
+
+var currentScope = scopeManager.acquire(ast);   // global scope
+
+estraverse.traverse(ast, {
+    enter: function(node, parent) {
+        // do stuff
+
+        if (/Function/.test(node.type)) {
+            currentScope = scopeManager.acquire(node);  // get current function scope
+        }
+    },
+    leave: function(node, parent) {
+        if (/Function/.test(node.type)) {
+            currentScope = currentScope.upper;  // set to parent scope
+        }
+
+        // do stuff
+    }
+});
+```
+
+## Contributing
+
+Issues and pull requests will be triaged and responded to as quickly as possible. We operate under the [ESLint Contributor Guidelines](http://eslint.org/docs/developer-guide/contributing), so please be sure to read them before contributing. If you're not sure where to dig in, check out the [issues](https://github.com/eslint/eslint-scope/issues).
+
+## Build Commands
+
+* `npm test` - run all linting and tests
+* `npm run lint` - run all linting
+
+## License
+
+ESLint Scope is licensed under a permissive BSD 2-clause license.
diff --git a/src/node_modules/eslint-scope/lib/definition.js b/src/node_modules/eslint-scope/lib/definition.js
new file mode 100644
index 0000000..172bfe2
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/definition.js
@@ -0,0 +1,86 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+const Variable = require("./variable");
+
+/**
+ * @class Definition
+ */
+class Definition {
+    constructor(type, name, node, parent, index, kind) {
+
+        /**
+         * @member {String} Definition#type - type of the occurrence (e.g. "Parameter", "Variable", ...).
+         */
+        this.type = type;
+
+        /**
+         * @member {espree.Identifier} Definition#name - the identifier AST node of the occurrence.
+         */
+        this.name = name;
+
+        /**
+         * @member {espree.Node} Definition#node - the enclosing node of the identifier.
+         */
+        this.node = node;
+
+        /**
+         * @member {espree.Node?} Definition#parent - the enclosing statement node of the identifier.
+         */
+        this.parent = parent;
+
+        /**
+         * @member {Number?} Definition#index - the index in the declaration statement.
+         */
+        this.index = index;
+
+        /**
+         * @member {String?} Definition#kind - the kind of the declaration statement.
+         */
+        this.kind = kind;
+    }
+}
+
+/**
+ * @class ParameterDefinition
+ */
+class ParameterDefinition extends Definition {
+    constructor(name, node, index, rest) {
+        super(Variable.Parameter, name, node, null, index, null);
+
+        /**
+         * Whether the parameter definition is a part of a rest parameter.
+         * @member {boolean} ParameterDefinition#rest
+         */
+        this.rest = rest;
+    }
+}
+
+module.exports = {
+    ParameterDefinition,
+    Definition
+};
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/index.js b/src/node_modules/eslint-scope/lib/index.js
new file mode 100644
index 0000000..0f16fa4
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/index.js
@@ -0,0 +1,165 @@
+/*
+  Copyright (C) 2012-2014 Yusuke Suzuki <utatane.tea@gmail.com>
+  Copyright (C) 2013 Alex Seville <hi@alexanderseville.com>
+  Copyright (C) 2014 Thiago de Arruda <tpadilha84@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/**
+ * Escope (<a href="http://github.com/estools/escope">escope</a>) is an <a
+ * href="http://www.ecma-international.org/publications/standards/Ecma-262.htm">ECMAScript</a>
+ * scope analyzer extracted from the <a
+ * href="http://github.com/estools/esmangle">esmangle project</a/>.
+ * <p>
+ * <em>escope</em> finds lexical scopes in a source program, i.e. areas of that
+ * program where different occurrences of the same identifier refer to the same
+ * variable. With each scope the contained variables are collected, and each
+ * identifier reference in code is linked to its corresponding variable (if
+ * possible).
+ * <p>
+ * <em>escope</em> works on a syntax tree of the parsed source code which has
+ * to adhere to the <a
+ * href="https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API">
+ * Mozilla Parser API</a>. E.g. <a href="https://github.com/eslint/espree">espree</a> is a parser
+ * that produces such syntax trees.
+ * <p>
+ * The main interface is the {@link analyze} function.
+ * @module escope
+ */
+"use strict";
+
+/* eslint no-underscore-dangle: ["error", { "allow": ["__currentScope"] }] */
+
+const assert = require("assert");
+
+const ScopeManager = require("./scope-manager");
+const Referencer = require("./referencer");
+const Reference = require("./reference");
+const Variable = require("./variable");
+const Scope = require("./scope").Scope;
+const version = require("../package.json").version;
+
+/**
+ * Set the default options
+ * @returns {Object} options
+ */
+function defaultOptions() {
+    return {
+        optimistic: false,
+        directive: false,
+        nodejsScope: false,
+        impliedStrict: false,
+        sourceType: "script", // one of ['script', 'module']
+        ecmaVersion: 5,
+        childVisitorKeys: null,
+        fallback: "iteration"
+    };
+}
+
+/**
+ * Preform deep update on option object
+ * @param {Object} target - Options
+ * @param {Object} override - Updates
+ * @returns {Object} Updated options
+ */
+function updateDeeply(target, override) {
+
+    /**
+     * Is hash object
+     * @param {Object} value - Test value
+     * @returns {boolean} Result
+     */
+    function isHashObject(value) {
+        return typeof value === "object" && value instanceof Object && !(value instanceof Array) && !(value instanceof RegExp);
+    }
+
+    for (const key in override) {
+        if (Object.prototype.hasOwnProperty.call(override, key)) {
+            const val = override[key];
+
+            if (isHashObject(val)) {
+                if (isHashObject(target[key])) {
+                    updateDeeply(target[key], val);
+                } else {
+                    target[key] = updateDeeply({}, val);
+                }
+            } else {
+                target[key] = val;
+            }
+        }
+    }
+    return target;
+}
+
+/**
+ * Main interface function. Takes an Espree syntax tree and returns the
+ * analyzed scopes.
+ * @function analyze
+ * @param {espree.Tree} tree - Abstract Syntax Tree
+ * @param {Object} providedOptions - Options that tailor the scope analysis
+ * @param {boolean} [providedOptions.optimistic=false] - the optimistic flag
+ * @param {boolean} [providedOptions.directive=false]- the directive flag
+ * @param {boolean} [providedOptions.ignoreEval=false]- whether to check 'eval()' calls
+ * @param {boolean} [providedOptions.nodejsScope=false]- whether the whole
+ * script is executed under node.js environment. When enabled, escope adds
+ * a function scope immediately following the global scope.
+ * @param {boolean} [providedOptions.impliedStrict=false]- implied strict mode
+ * (if ecmaVersion >= 5).
+ * @param {string} [providedOptions.sourceType='script']- the source type of the script. one of 'script' and 'module'
+ * @param {number} [providedOptions.ecmaVersion=5]- which ECMAScript version is considered
+ * @param {Object} [providedOptions.childVisitorKeys=null] - Additional known visitor keys. See [esrecurse](https://github.com/estools/esrecurse)'s the `childVisitorKeys` option.
+ * @param {string} [providedOptions.fallback='iteration'] - A kind of the fallback in order to encounter with unknown node. See [esrecurse](https://github.com/estools/esrecurse)'s the `fallback` option.
+ * @returns {ScopeManager} ScopeManager
+ */
+function analyze(tree, providedOptions) {
+    const options = updateDeeply(defaultOptions(), providedOptions);
+    const scopeManager = new ScopeManager(options);
+    const referencer = new Referencer(options, scopeManager);
+
+    referencer.visit(tree);
+
+    assert(scopeManager.__currentScope === null, "currentScope should be null.");
+
+    return scopeManager;
+}
+
+module.exports = {
+
+    /** @name module:escope.version */
+    version,
+
+    /** @name module:escope.Reference */
+    Reference,
+
+    /** @name module:escope.Variable */
+    Variable,
+
+    /** @name module:escope.Scope */
+    Scope,
+
+    /** @name module:escope.ScopeManager */
+    ScopeManager,
+    analyze
+};
+
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/pattern-visitor.js b/src/node_modules/eslint-scope/lib/pattern-visitor.js
new file mode 100644
index 0000000..afa6291
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/pattern-visitor.js
@@ -0,0 +1,152 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+/* eslint-disable no-undefined */
+
+const Syntax = require("estraverse").Syntax;
+const esrecurse = require("esrecurse");
+
+/**
+ * Get last array element
+ * @param {array} xs - array
+ * @returns {any} Last elment
+ */
+function getLast(xs) {
+    return xs[xs.length - 1] || null;
+}
+
+class PatternVisitor extends esrecurse.Visitor {
+    static isPattern(node) {
+        const nodeType = node.type;
+
+        return (
+            nodeType === Syntax.Identifier ||
+            nodeType === Syntax.ObjectPattern ||
+            nodeType === Syntax.ArrayPattern ||
+            nodeType === Syntax.SpreadElement ||
+            nodeType === Syntax.RestElement ||
+            nodeType === Syntax.AssignmentPattern
+        );
+    }
+
+    constructor(options, rootPattern, callback) {
+        super(null, options);
+        this.rootPattern = rootPattern;
+        this.callback = callback;
+        this.assignments = [];
+        this.rightHandNodes = [];
+        this.restElements = [];
+    }
+
+    Identifier(pattern) {
+        const lastRestElement = getLast(this.restElements);
+
+        this.callback(pattern, {
+            topLevel: pattern === this.rootPattern,
+            rest: lastRestElement !== null && lastRestElement !== undefined && lastRestElement.argument === pattern,
+            assignments: this.assignments
+        });
+    }
+
+    Property(property) {
+
+        // Computed property's key is a right hand node.
+        if (property.computed) {
+            this.rightHandNodes.push(property.key);
+        }
+
+        // If it's shorthand, its key is same as its value.
+        // If it's shorthand and has its default value, its key is same as its value.left (the value is AssignmentPattern).
+        // If it's not shorthand, the name of new variable is its value's.
+        this.visit(property.value);
+    }
+
+    ArrayPattern(pattern) {
+        for (let i = 0, iz = pattern.elements.length; i < iz; ++i) {
+            const element = pattern.elements[i];
+
+            this.visit(element);
+        }
+    }
+
+    AssignmentPattern(pattern) {
+        this.assignments.push(pattern);
+        this.visit(pattern.left);
+        this.rightHandNodes.push(pattern.right);
+        this.assignments.pop();
+    }
+
+    RestElement(pattern) {
+        this.restElements.push(pattern);
+        this.visit(pattern.argument);
+        this.restElements.pop();
+    }
+
+    MemberExpression(node) {
+
+        // Computed property's key is a right hand node.
+        if (node.computed) {
+            this.rightHandNodes.push(node.property);
+        }
+
+        // the object is only read, write to its property.
+        this.rightHandNodes.push(node.object);
+    }
+
+    //
+    // ForInStatement.left and AssignmentExpression.left are LeftHandSideExpression.
+    // By spec, LeftHandSideExpression is Pattern or MemberExpression.
+    //   (see also: https://github.com/estree/estree/pull/20#issuecomment-74584758)
+    // But espree 2.0 parses to ArrayExpression, ObjectExpression, etc...
+    //
+
+    SpreadElement(node) {
+        this.visit(node.argument);
+    }
+
+    ArrayExpression(node) {
+        node.elements.forEach(this.visit, this);
+    }
+
+    AssignmentExpression(node) {
+        this.assignments.push(node);
+        this.visit(node.left);
+        this.rightHandNodes.push(node.right);
+        this.assignments.pop();
+    }
+
+    CallExpression(node) {
+
+        // arguments are right hand nodes.
+        node.arguments.forEach(a => {
+            this.rightHandNodes.push(a);
+        });
+        this.visit(node.callee);
+    }
+}
+
+module.exports = PatternVisitor;
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/reference.js b/src/node_modules/eslint-scope/lib/reference.js
new file mode 100644
index 0000000..9529827
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/reference.js
@@ -0,0 +1,167 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+const READ = 0x1;
+const WRITE = 0x2;
+const RW = READ | WRITE;
+
+/**
+ * A Reference represents a single occurrence of an identifier in code.
+ * @class Reference
+ */
+class Reference {
+    constructor(ident, scope, flag, writeExpr, maybeImplicitGlobal, partial, init) {
+
+        /**
+         * Identifier syntax node.
+         * @member {espreeIdentifier} Reference#identifier
+         */
+        this.identifier = ident;
+
+        /**
+         * Reference to the enclosing Scope.
+         * @member {Scope} Reference#from
+         */
+        this.from = scope;
+
+        /**
+         * Whether the reference comes from a dynamic scope (such as 'eval',
+         * 'with', etc.), and may be trapped by dynamic scopes.
+         * @member {boolean} Reference#tainted
+         */
+        this.tainted = false;
+
+        /**
+         * The variable this reference is resolved with.
+         * @member {Variable} Reference#resolved
+         */
+        this.resolved = null;
+
+        /**
+         * The read-write mode of the reference. (Value is one of {@link
+         * Reference.READ}, {@link Reference.RW}, {@link Reference.WRITE}).
+         * @member {number} Reference#flag
+         * @private
+         */
+        this.flag = flag;
+        if (this.isWrite()) {
+
+            /**
+             * If reference is writeable, this is the tree being written to it.
+             * @member {espreeNode} Reference#writeExpr
+             */
+            this.writeExpr = writeExpr;
+
+            /**
+             * Whether the Reference might refer to a partial value of writeExpr.
+             * @member {boolean} Reference#partial
+             */
+            this.partial = partial;
+
+            /**
+             * Whether the Reference is to write of initialization.
+             * @member {boolean} Reference#init
+             */
+            this.init = init;
+        }
+        this.__maybeImplicitGlobal = maybeImplicitGlobal;
+    }
+
+    /**
+     * Whether the reference is static.
+     * @method Reference#isStatic
+     * @returns {boolean} static
+     */
+    isStatic() {
+        return !this.tainted && this.resolved && this.resolved.scope.isStatic();
+    }
+
+    /**
+     * Whether the reference is writeable.
+     * @method Reference#isWrite
+     * @returns {boolean} write
+     */
+    isWrite() {
+        return !!(this.flag & Reference.WRITE);
+    }
+
+    /**
+     * Whether the reference is readable.
+     * @method Reference#isRead
+     * @returns {boolean} read
+     */
+    isRead() {
+        return !!(this.flag & Reference.READ);
+    }
+
+    /**
+     * Whether the reference is read-only.
+     * @method Reference#isReadOnly
+     * @returns {boolean} read only
+     */
+    isReadOnly() {
+        return this.flag === Reference.READ;
+    }
+
+    /**
+     * Whether the reference is write-only.
+     * @method Reference#isWriteOnly
+     * @returns {boolean} write only
+     */
+    isWriteOnly() {
+        return this.flag === Reference.WRITE;
+    }
+
+    /**
+     * Whether the reference is read-write.
+     * @method Reference#isReadWrite
+     * @returns {boolean} read write
+     */
+    isReadWrite() {
+        return this.flag === Reference.RW;
+    }
+}
+
+/**
+ * @constant Reference.READ
+ * @private
+ */
+Reference.READ = READ;
+
+/**
+ * @constant Reference.WRITE
+ * @private
+ */
+Reference.WRITE = WRITE;
+
+/**
+ * @constant Reference.RW
+ * @private
+ */
+Reference.RW = RW;
+
+module.exports = Reference;
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/referencer.js b/src/node_modules/eslint-scope/lib/referencer.js
new file mode 100644
index 0000000..63d1935
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/referencer.js
@@ -0,0 +1,629 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+/* eslint-disable no-underscore-dangle */
+/* eslint-disable no-undefined */
+
+const Syntax = require("estraverse").Syntax;
+const esrecurse = require("esrecurse");
+const Reference = require("./reference");
+const Variable = require("./variable");
+const PatternVisitor = require("./pattern-visitor");
+const definition = require("./definition");
+const assert = require("assert");
+
+const ParameterDefinition = definition.ParameterDefinition;
+const Definition = definition.Definition;
+
+/**
+ * Traverse identifier in pattern
+ * @param {Object} options - options
+ * @param {pattern} rootPattern - root pattern
+ * @param {Refencer} referencer - referencer
+ * @param {callback} callback - callback
+ * @returns {void}
+ */
+function traverseIdentifierInPattern(options, rootPattern, referencer, callback) {
+
+    // Call the callback at left hand identifier nodes, and Collect right hand nodes.
+    const visitor = new PatternVisitor(options, rootPattern, callback);
+
+    visitor.visit(rootPattern);
+
+    // Process the right hand nodes recursively.
+    if (referencer !== null && referencer !== undefined) {
+        visitor.rightHandNodes.forEach(referencer.visit, referencer);
+    }
+}
+
+// Importing ImportDeclaration.
+// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-moduledeclarationinstantiation
+// https://github.com/estree/estree/blob/master/es6.md#importdeclaration
+// FIXME: Now, we don't create module environment, because the context is
+// implementation dependent.
+
+class Importer extends esrecurse.Visitor {
+    constructor(declaration, referencer) {
+        super(null, referencer.options);
+        this.declaration = declaration;
+        this.referencer = referencer;
+    }
+
+    visitImport(id, specifier) {
+        this.referencer.visitPattern(id, pattern => {
+            this.referencer.currentScope().__define(pattern,
+                new Definition(
+                    Variable.ImportBinding,
+                    pattern,
+                    specifier,
+                    this.declaration,
+                    null,
+                    null
+                ));
+        });
+    }
+
+    ImportNamespaceSpecifier(node) {
+        const local = (node.local || node.id);
+
+        if (local) {
+            this.visitImport(local, node);
+        }
+    }
+
+    ImportDefaultSpecifier(node) {
+        const local = (node.local || node.id);
+
+        this.visitImport(local, node);
+    }
+
+    ImportSpecifier(node) {
+        const local = (node.local || node.id);
+
+        if (node.name) {
+            this.visitImport(node.name, node);
+        } else {
+            this.visitImport(local, node);
+        }
+    }
+}
+
+// Referencing variables and creating bindings.
+class Referencer extends esrecurse.Visitor {
+    constructor(options, scopeManager) {
+        super(null, options);
+        this.options = options;
+        this.scopeManager = scopeManager;
+        this.parent = null;
+        this.isInnerMethodDefinition = false;
+    }
+
+    currentScope() {
+        return this.scopeManager.__currentScope;
+    }
+
+    close(node) {
+        while (this.currentScope() && node === this.currentScope().block) {
+            this.scopeManager.__currentScope = this.currentScope().__close(this.scopeManager);
+        }
+    }
+
+    pushInnerMethodDefinition(isInnerMethodDefinition) {
+        const previous = this.isInnerMethodDefinition;
+
+        this.isInnerMethodDefinition = isInnerMethodDefinition;
+        return previous;
+    }
+
+    popInnerMethodDefinition(isInnerMethodDefinition) {
+        this.isInnerMethodDefinition = isInnerMethodDefinition;
+    }
+
+    referencingDefaultValue(pattern, assignments, maybeImplicitGlobal, init) {
+        const scope = this.currentScope();
+
+        assignments.forEach(assignment => {
+            scope.__referencing(
+                pattern,
+                Reference.WRITE,
+                assignment.right,
+                maybeImplicitGlobal,
+                pattern !== assignment.left,
+                init
+            );
+        });
+    }
+
+    visitPattern(node, options, callback) {
+        let visitPatternOptions = options;
+        let visitPatternCallback = callback;
+
+        if (typeof options === "function") {
+            visitPatternCallback = options;
+            visitPatternOptions = { processRightHandNodes: false };
+        }
+
+        traverseIdentifierInPattern(
+            this.options,
+            node,
+            visitPatternOptions.processRightHandNodes ? this : null,
+            visitPatternCallback
+        );
+    }
+
+    visitFunction(node) {
+        let i, iz;
+
+        // FunctionDeclaration name is defined in upper scope
+        // NOTE: Not referring variableScope. It is intended.
+        // Since
+        //  in ES5, FunctionDeclaration should be in FunctionBody.
+        //  in ES6, FunctionDeclaration should be block scoped.
+
+        if (node.type === Syntax.FunctionDeclaration) {
+
+            // id is defined in upper scope
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.FunctionName,
+                    node.id,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+        }
+
+        // FunctionExpression with name creates its special scope;
+        // FunctionExpressionNameScope.
+        if (node.type === Syntax.FunctionExpression && node.id) {
+            this.scopeManager.__nestFunctionExpressionNameScope(node);
+        }
+
+        // Consider this function is in the MethodDefinition.
+        this.scopeManager.__nestFunctionScope(node, this.isInnerMethodDefinition);
+
+        const that = this;
+
+        /**
+         * Visit pattern callback
+         * @param {pattern} pattern - pattern
+         * @param {Object} info - info
+         * @returns {void}
+         */
+        function visitPatternCallback(pattern, info) {
+            that.currentScope().__define(pattern,
+                new ParameterDefinition(
+                    pattern,
+                    node,
+                    i,
+                    info.rest
+                ));
+
+            that.referencingDefaultValue(pattern, info.assignments, null, true);
+        }
+
+        // Process parameter declarations.
+        for (i = 0, iz = node.params.length; i < iz; ++i) {
+            this.visitPattern(node.params[i], { processRightHandNodes: true }, visitPatternCallback);
+        }
+
+        // if there's a rest argument, add that
+        if (node.rest) {
+            this.visitPattern({
+                type: "RestElement",
+                argument: node.rest
+            }, pattern => {
+                this.currentScope().__define(pattern,
+                    new ParameterDefinition(
+                        pattern,
+                        node,
+                        node.params.length,
+                        true
+                    ));
+            });
+        }
+
+        // In TypeScript there are a number of function-like constructs which have no body,
+        // so check it exists before traversing
+        if (node.body) {
+
+            // Skip BlockStatement to prevent creating BlockStatement scope.
+            if (node.body.type === Syntax.BlockStatement) {
+                this.visitChildren(node.body);
+            } else {
+                this.visit(node.body);
+            }
+        }
+
+        this.close(node);
+    }
+
+    visitClass(node) {
+        if (node.type === Syntax.ClassDeclaration) {
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.ClassName,
+                    node.id,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+        }
+
+        this.visit(node.superClass);
+
+        this.scopeManager.__nestClassScope(node);
+
+        if (node.id) {
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.ClassName,
+                    node.id,
+                    node
+                ));
+        }
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    visitProperty(node) {
+        let previous;
+
+        if (node.computed) {
+            this.visit(node.key);
+        }
+
+        const isMethodDefinition = node.type === Syntax.MethodDefinition;
+
+        if (isMethodDefinition) {
+            previous = this.pushInnerMethodDefinition(true);
+        }
+        this.visit(node.value);
+        if (isMethodDefinition) {
+            this.popInnerMethodDefinition(previous);
+        }
+    }
+
+    visitForIn(node) {
+        if (node.left.type === Syntax.VariableDeclaration && node.left.kind !== "var") {
+            this.scopeManager.__nestForScope(node);
+        }
+
+        if (node.left.type === Syntax.VariableDeclaration) {
+            this.visit(node.left);
+            this.visitPattern(node.left.declarations[0].id, pattern => {
+                this.currentScope().__referencing(pattern, Reference.WRITE, node.right, null, true, true);
+            });
+        } else {
+            this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
+                let maybeImplicitGlobal = null;
+
+                if (!this.currentScope().isStrict) {
+                    maybeImplicitGlobal = {
+                        pattern,
+                        node
+                    };
+                }
+                this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
+                this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, true, false);
+            });
+        }
+        this.visit(node.right);
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    visitVariableDeclaration(variableTargetScope, type, node, index) {
+
+        const decl = node.declarations[index];
+        const init = decl.init;
+
+        this.visitPattern(decl.id, { processRightHandNodes: true }, (pattern, info) => {
+            variableTargetScope.__define(
+                pattern,
+                new Definition(
+                    type,
+                    pattern,
+                    decl,
+                    node,
+                    index,
+                    node.kind
+                )
+            );
+
+            this.referencingDefaultValue(pattern, info.assignments, null, true);
+            if (init) {
+                this.currentScope().__referencing(pattern, Reference.WRITE, init, null, !info.topLevel, true);
+            }
+        });
+    }
+
+    AssignmentExpression(node) {
+        if (PatternVisitor.isPattern(node.left)) {
+            if (node.operator === "=") {
+                this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
+                    let maybeImplicitGlobal = null;
+
+                    if (!this.currentScope().isStrict) {
+                        maybeImplicitGlobal = {
+                            pattern,
+                            node
+                        };
+                    }
+                    this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
+                    this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, !info.topLevel, false);
+                });
+            } else {
+                this.currentScope().__referencing(node.left, Reference.RW, node.right);
+            }
+        } else {
+            this.visit(node.left);
+        }
+        this.visit(node.right);
+    }
+
+    CatchClause(node) {
+        this.scopeManager.__nestCatchScope(node);
+
+        this.visitPattern(node.param, { processRightHandNodes: true }, (pattern, info) => {
+            this.currentScope().__define(pattern,
+                new Definition(
+                    Variable.CatchClause,
+                    node.param,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+            this.referencingDefaultValue(pattern, info.assignments, null, true);
+        });
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    Program(node) {
+        this.scopeManager.__nestGlobalScope(node);
+
+        if (this.scopeManager.__isNodejsScope()) {
+
+            // Force strictness of GlobalScope to false when using node.js scope.
+            this.currentScope().isStrict = false;
+            this.scopeManager.__nestFunctionScope(node, false);
+        }
+
+        if (this.scopeManager.__isES6() && this.scopeManager.isModule()) {
+            this.scopeManager.__nestModuleScope(node);
+        }
+
+        if (this.scopeManager.isStrictModeSupported() && this.scopeManager.isImpliedStrict()) {
+            this.currentScope().isStrict = true;
+        }
+
+        this.visitChildren(node);
+        this.close(node);
+    }
+
+    Identifier(node) {
+        this.currentScope().__referencing(node);
+    }
+
+    UpdateExpression(node) {
+        if (PatternVisitor.isPattern(node.argument)) {
+            this.currentScope().__referencing(node.argument, Reference.RW, null);
+        } else {
+            this.visitChildren(node);
+        }
+    }
+
+    MemberExpression(node) {
+        this.visit(node.object);
+        if (node.computed) {
+            this.visit(node.property);
+        }
+    }
+
+    Property(node) {
+        this.visitProperty(node);
+    }
+
+    MethodDefinition(node) {
+        this.visitProperty(node);
+    }
+
+    BreakStatement() {} // eslint-disable-line class-methods-use-this
+
+    ContinueStatement() {} // eslint-disable-line class-methods-use-this
+
+    LabeledStatement(node) {
+        this.visit(node.body);
+    }
+
+    ForStatement(node) {
+
+        // Create ForStatement declaration.
+        // NOTE: In ES6, ForStatement dynamically generates
+        // per iteration environment. However, escope is
+        // a static analyzer, we only generate one scope for ForStatement.
+        if (node.init && node.init.type === Syntax.VariableDeclaration && node.init.kind !== "var") {
+            this.scopeManager.__nestForScope(node);
+        }
+
+        this.visitChildren(node);
+
+        this.close(node);
+    }
+
+    ClassExpression(node) {
+        this.visitClass(node);
+    }
+
+    ClassDeclaration(node) {
+        this.visitClass(node);
+    }
+
+    CallExpression(node) {
+
+        // Check this is direct call to eval
+        if (!this.scopeManager.__ignoreEval() && node.callee.type === Syntax.Identifier && node.callee.name === "eval") {
+
+            // NOTE: This should be `variableScope`. Since direct eval call always creates Lexical environment and
+            // let / const should be enclosed into it. Only VariableDeclaration affects on the caller's environment.
+            this.currentScope().variableScope.__detectEval();
+        }
+        this.visitChildren(node);
+    }
+
+    BlockStatement(node) {
+        if (this.scopeManager.__isES6()) {
+            this.scopeManager.__nestBlockScope(node);
+        }
+
+        this.visitChildren(node);
+
+        this.close(node);
+    }
+
+    ThisExpression() {
+        this.currentScope().variableScope.__detectThis();
+    }
+
+    WithStatement(node) {
+        this.visit(node.object);
+
+        // Then nest scope for WithStatement.
+        this.scopeManager.__nestWithScope(node);
+
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    VariableDeclaration(node) {
+        const variableTargetScope = (node.kind === "var") ? this.currentScope().variableScope : this.currentScope();
+
+        for (let i = 0, iz = node.declarations.length; i < iz; ++i) {
+            const decl = node.declarations[i];
+
+            this.visitVariableDeclaration(variableTargetScope, Variable.Variable, node, i);
+            if (decl.init) {
+                this.visit(decl.init);
+            }
+        }
+    }
+
+    // sec 13.11.8
+    SwitchStatement(node) {
+        this.visit(node.discriminant);
+
+        if (this.scopeManager.__isES6()) {
+            this.scopeManager.__nestSwitchScope(node);
+        }
+
+        for (let i = 0, iz = node.cases.length; i < iz; ++i) {
+            this.visit(node.cases[i]);
+        }
+
+        this.close(node);
+    }
+
+    FunctionDeclaration(node) {
+        this.visitFunction(node);
+    }
+
+    FunctionExpression(node) {
+        this.visitFunction(node);
+    }
+
+    ForOfStatement(node) {
+        this.visitForIn(node);
+    }
+
+    ForInStatement(node) {
+        this.visitForIn(node);
+    }
+
+    ArrowFunctionExpression(node) {
+        this.visitFunction(node);
+    }
+
+    ImportDeclaration(node) {
+        assert(this.scopeManager.__isES6() && this.scopeManager.isModule(), "ImportDeclaration should appear when the mode is ES6 and in the module context.");
+
+        const importer = new Importer(node, this);
+
+        importer.visit(node);
+    }
+
+    visitExportDeclaration(node) {
+        if (node.source) {
+            return;
+        }
+        if (node.declaration) {
+            this.visit(node.declaration);
+            return;
+        }
+
+        this.visitChildren(node);
+    }
+
+    // TODO: ExportDeclaration doesn't exist. for bc?
+    ExportDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportAllDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportDefaultDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportNamedDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportSpecifier(node) {
+
+        // TODO: `node.id` doesn't exist. for bc?
+        const local = (node.id || node.local);
+
+        this.visit(local);
+    }
+
+    MetaProperty() { // eslint-disable-line class-methods-use-this
+
+        // do nothing.
+    }
+}
+
+module.exports = Referencer;
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/scope-manager.js b/src/node_modules/eslint-scope/lib/scope-manager.js
new file mode 100644
index 0000000..c192799
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/scope-manager.js
@@ -0,0 +1,247 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+/* eslint-disable no-underscore-dangle */
+
+const Scope = require("./scope");
+const assert = require("assert");
+
+const GlobalScope = Scope.GlobalScope;
+const CatchScope = Scope.CatchScope;
+const WithScope = Scope.WithScope;
+const ModuleScope = Scope.ModuleScope;
+const ClassScope = Scope.ClassScope;
+const SwitchScope = Scope.SwitchScope;
+const FunctionScope = Scope.FunctionScope;
+const ForScope = Scope.ForScope;
+const FunctionExpressionNameScope = Scope.FunctionExpressionNameScope;
+const BlockScope = Scope.BlockScope;
+
+/**
+ * @class ScopeManager
+ */
+class ScopeManager {
+    constructor(options) {
+        this.scopes = [];
+        this.globalScope = null;
+        this.__nodeToScope = new WeakMap();
+        this.__currentScope = null;
+        this.__options = options;
+        this.__declaredVariables = new WeakMap();
+    }
+
+    __useDirective() {
+        return this.__options.directive;
+    }
+
+    __isOptimistic() {
+        return this.__options.optimistic;
+    }
+
+    __ignoreEval() {
+        return this.__options.ignoreEval;
+    }
+
+    __isNodejsScope() {
+        return this.__options.nodejsScope;
+    }
+
+    isModule() {
+        return this.__options.sourceType === "module";
+    }
+
+    isImpliedStrict() {
+        return this.__options.impliedStrict;
+    }
+
+    isStrictModeSupported() {
+        return this.__options.ecmaVersion >= 5;
+    }
+
+    // Returns appropriate scope for this node.
+    __get(node) {
+        return this.__nodeToScope.get(node);
+    }
+
+    /**
+     * Get variables that are declared by the node.
+     *
+     * "are declared by the node" means the node is same as `Variable.defs[].node` or `Variable.defs[].parent`.
+     * If the node declares nothing, this method returns an empty array.
+     * CAUTION: This API is experimental. See https://github.com/estools/escope/pull/69 for more details.
+     *
+     * @param {Espree.Node} node - a node to get.
+     * @returns {Variable[]} variables that declared by the node.
+     */
+    getDeclaredVariables(node) {
+        return this.__declaredVariables.get(node) || [];
+    }
+
+    /**
+     * acquire scope from node.
+     * @method ScopeManager#acquire
+     * @param {Espree.Node} node - node for the acquired scope.
+     * @param {boolean=} inner - look up the most inner scope, default value is false.
+     * @returns {Scope?} Scope from node
+     */
+    acquire(node, inner) {
+
+        /**
+         * predicate
+         * @param {Scope} testScope - scope to test
+         * @returns {boolean} predicate
+         */
+        function predicate(testScope) {
+            if (testScope.type === "function" && testScope.functionExpressionScope) {
+                return false;
+            }
+            return true;
+        }
+
+        const scopes = this.__get(node);
+
+        if (!scopes || scopes.length === 0) {
+            return null;
+        }
+
+        // Heuristic selection from all scopes.
+        // If you would like to get all scopes, please use ScopeManager#acquireAll.
+        if (scopes.length === 1) {
+            return scopes[0];
+        }
+
+        if (inner) {
+            for (let i = scopes.length - 1; i >= 0; --i) {
+                const scope = scopes[i];
+
+                if (predicate(scope)) {
+                    return scope;
+                }
+            }
+        } else {
+            for (let i = 0, iz = scopes.length; i < iz; ++i) {
+                const scope = scopes[i];
+
+                if (predicate(scope)) {
+                    return scope;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * acquire all scopes from node.
+     * @method ScopeManager#acquireAll
+     * @param {Espree.Node} node - node for the acquired scope.
+     * @returns {Scopes?} Scope array
+     */
+    acquireAll(node) {
+        return this.__get(node);
+    }
+
+    /**
+     * release the node.
+     * @method ScopeManager#release
+     * @param {Espree.Node} node - releasing node.
+     * @param {boolean=} inner - look up the most inner scope, default value is false.
+     * @returns {Scope?} upper scope for the node.
+     */
+    release(node, inner) {
+        const scopes = this.__get(node);
+
+        if (scopes && scopes.length) {
+            const scope = scopes[0].upper;
+
+            if (!scope) {
+                return null;
+            }
+            return this.acquire(scope.block, inner);
+        }
+        return null;
+    }
+
+    attach() { } // eslint-disable-line class-methods-use-this
+
+    detach() { } // eslint-disable-line class-methods-use-this
+
+    __nestScope(scope) {
+        if (scope instanceof GlobalScope) {
+            assert(this.__currentScope === null);
+            this.globalScope = scope;
+        }
+        this.__currentScope = scope;
+        return scope;
+    }
+
+    __nestGlobalScope(node) {
+        return this.__nestScope(new GlobalScope(this, node));
+    }
+
+    __nestBlockScope(node) {
+        return this.__nestScope(new BlockScope(this, this.__currentScope, node));
+    }
+
+    __nestFunctionScope(node, isMethodDefinition) {
+        return this.__nestScope(new FunctionScope(this, this.__currentScope, node, isMethodDefinition));
+    }
+
+    __nestForScope(node) {
+        return this.__nestScope(new ForScope(this, this.__currentScope, node));
+    }
+
+    __nestCatchScope(node) {
+        return this.__nestScope(new CatchScope(this, this.__currentScope, node));
+    }
+
+    __nestWithScope(node) {
+        return this.__nestScope(new WithScope(this, this.__currentScope, node));
+    }
+
+    __nestClassScope(node) {
+        return this.__nestScope(new ClassScope(this, this.__currentScope, node));
+    }
+
+    __nestSwitchScope(node) {
+        return this.__nestScope(new SwitchScope(this, this.__currentScope, node));
+    }
+
+    __nestModuleScope(node) {
+        return this.__nestScope(new ModuleScope(this, this.__currentScope, node));
+    }
+
+    __nestFunctionExpressionNameScope(node) {
+        return this.__nestScope(new FunctionExpressionNameScope(this, this.__currentScope, node));
+    }
+
+    __isES6() {
+        return this.__options.ecmaVersion >= 6;
+    }
+}
+
+module.exports = ScopeManager;
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/scope.js b/src/node_modules/eslint-scope/lib/scope.js
new file mode 100644
index 0000000..bdb5f63
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/scope.js
@@ -0,0 +1,748 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+/* eslint-disable no-underscore-dangle */
+/* eslint-disable no-undefined */
+
+const Syntax = require("estraverse").Syntax;
+
+const Reference = require("./reference");
+const Variable = require("./variable");
+const Definition = require("./definition").Definition;
+const assert = require("assert");
+
+/**
+ * Test if scope is struct
+ * @param {Scope} scope - scope
+ * @param {Block} block - block
+ * @param {boolean} isMethodDefinition - is method definition
+ * @param {boolean} useDirective - use directive
+ * @returns {boolean} is strict scope
+ */
+function isStrictScope(scope, block, isMethodDefinition, useDirective) {
+    let body;
+
+    // When upper scope is exists and strict, inner scope is also strict.
+    if (scope.upper && scope.upper.isStrict) {
+        return true;
+    }
+
+    if (isMethodDefinition) {
+        return true;
+    }
+
+    if (scope.type === "class" || scope.type === "module") {
+        return true;
+    }
+
+    if (scope.type === "block" || scope.type === "switch") {
+        return false;
+    }
+
+    if (scope.type === "function") {
+        if (block.type === Syntax.ArrowFunctionExpression && block.body.type !== Syntax.BlockStatement) {
+            return false;
+        }
+
+        if (block.type === Syntax.Program) {
+            body = block;
+        } else {
+            body = block.body;
+        }
+
+        if (!body) {
+            return false;
+        }
+    } else if (scope.type === "global") {
+        body = block;
+    } else {
+        return false;
+    }
+
+    // Search 'use strict' directive.
+    if (useDirective) {
+        for (let i = 0, iz = body.body.length; i < iz; ++i) {
+            const stmt = body.body[i];
+
+            if (stmt.type !== Syntax.DirectiveStatement) {
+                break;
+            }
+            if (stmt.raw === "\"use strict\"" || stmt.raw === "'use strict'") {
+                return true;
+            }
+        }
+    } else {
+        for (let i = 0, iz = body.body.length; i < iz; ++i) {
+            const stmt = body.body[i];
+
+            if (stmt.type !== Syntax.ExpressionStatement) {
+                break;
+            }
+            const expr = stmt.expression;
+
+            if (expr.type !== Syntax.Literal || typeof expr.value !== "string") {
+                break;
+            }
+            if (expr.raw !== null && expr.raw !== undefined) {
+                if (expr.raw === "\"use strict\"" || expr.raw === "'use strict'") {
+                    return true;
+                }
+            } else {
+                if (expr.value === "use strict") {
+                    return true;
+                }
+            }
+        }
+    }
+    return false;
+}
+
+/**
+ * Register scope
+ * @param {ScopeManager} scopeManager - scope manager
+ * @param {Scope} scope - scope
+ * @returns {void}
+ */
+function registerScope(scopeManager, scope) {
+    scopeManager.scopes.push(scope);
+
+    const scopes = scopeManager.__nodeToScope.get(scope.block);
+
+    if (scopes) {
+        scopes.push(scope);
+    } else {
+        scopeManager.__nodeToScope.set(scope.block, [scope]);
+    }
+}
+
+/**
+ * Should be statically
+ * @param {Object} def - def
+ * @returns {boolean} should be statically
+ */
+function shouldBeStatically(def) {
+    return (
+        (def.type === Variable.ClassName) ||
+        (def.type === Variable.Variable && def.parent.kind !== "var")
+    );
+}
+
+/**
+ * @class Scope
+ */
+class Scope {
+    constructor(scopeManager, type, upperScope, block, isMethodDefinition) {
+
+        /**
+         * One of 'module', 'block', 'switch', 'function', 'catch', 'with', 'function', 'class', 'global'.
+         * @member {String} Scope#type
+         */
+        this.type = type;
+
+        /**
+         * The scoped {@link Variable}s of this scope, as <code>{ Variable.name
+         * : Variable }</code>.
+         * @member {Map} Scope#set
+         */
+        this.set = new Map();
+
+        /**
+         * The tainted variables of this scope, as <code>{ Variable.name :
+         * boolean }</code>.
+         * @member {Map} Scope#taints */
+        this.taints = new Map();
+
+        /**
+         * Generally, through the lexical scoping of JS you can always know
+         * which variable an identifier in the source code refers to. There are
+         * a few exceptions to this rule. With 'global' and 'with' scopes you
+         * can only decide at runtime which variable a reference refers to.
+         * Moreover, if 'eval()' is used in a scope, it might introduce new
+         * bindings in this or its parent scopes.
+         * All those scopes are considered 'dynamic'.
+         * @member {boolean} Scope#dynamic
+         */
+        this.dynamic = this.type === "global" || this.type === "with";
+
+        /**
+         * A reference to the scope-defining syntax node.
+         * @member {espree.Node} Scope#block
+         */
+        this.block = block;
+
+        /**
+         * The {@link Reference|references} that are not resolved with this scope.
+         * @member {Reference[]} Scope#through
+         */
+        this.through = [];
+
+        /**
+         * The scoped {@link Variable}s of this scope. In the case of a
+         * 'function' scope this includes the automatic argument <em>arguments</em> as
+         * its first element, as well as all further formal arguments.
+         * @member {Variable[]} Scope#variables
+         */
+        this.variables = [];
+
+        /**
+         * Any variable {@link Reference|reference} found in this scope. This
+         * includes occurrences of local variables as well as variables from
+         * parent scopes (including the global scope). For local variables
+         * this also includes defining occurrences (like in a 'var' statement).
+         * In a 'function' scope this does not include the occurrences of the
+         * formal parameter in the parameter list.
+         * @member {Reference[]} Scope#references
+         */
+        this.references = [];
+
+        /**
+         * For 'global' and 'function' scopes, this is a self-reference. For
+         * other scope types this is the <em>variableScope</em> value of the
+         * parent scope.
+         * @member {Scope} Scope#variableScope
+         */
+        this.variableScope =
+            (this.type === "global" || this.type === "function" || this.type === "module") ? this : upperScope.variableScope;
+
+        /**
+         * Whether this scope is created by a FunctionExpression.
+         * @member {boolean} Scope#functionExpressionScope
+         */
+        this.functionExpressionScope = false;
+
+        /**
+         * Whether this is a scope that contains an 'eval()' invocation.
+         * @member {boolean} Scope#directCallToEvalScope
+         */
+        this.directCallToEvalScope = false;
+
+        /**
+         * @member {boolean} Scope#thisFound
+         */
+        this.thisFound = false;
+
+        this.__left = [];
+
+        /**
+         * Reference to the parent {@link Scope|scope}.
+         * @member {Scope} Scope#upper
+         */
+        this.upper = upperScope;
+
+        /**
+         * Whether 'use strict' is in effect in this scope.
+         * @member {boolean} Scope#isStrict
+         */
+        this.isStrict = isStrictScope(this, block, isMethodDefinition, scopeManager.__useDirective());
+
+        /**
+         * List of nested {@link Scope}s.
+         * @member {Scope[]} Scope#childScopes
+         */
+        this.childScopes = [];
+        if (this.upper) {
+            this.upper.childScopes.push(this);
+        }
+
+        this.__declaredVariables = scopeManager.__declaredVariables;
+
+        registerScope(scopeManager, this);
+    }
+
+    __shouldStaticallyClose(scopeManager) {
+        return (!this.dynamic || scopeManager.__isOptimistic());
+    }
+
+    __shouldStaticallyCloseForGlobal(ref) {
+
+        // On global scope, let/const/class declarations should be resolved statically.
+        const name = ref.identifier.name;
+
+        if (!this.set.has(name)) {
+            return false;
+        }
+
+        const variable = this.set.get(name);
+        const defs = variable.defs;
+
+        return defs.length > 0 && defs.every(shouldBeStatically);
+    }
+
+    __staticCloseRef(ref) {
+        if (!this.__resolve(ref)) {
+            this.__delegateToUpperScope(ref);
+        }
+    }
+
+    __dynamicCloseRef(ref) {
+
+        // notify all names are through to global
+        let current = this;
+
+        do {
+            current.through.push(ref);
+            current = current.upper;
+        } while (current);
+    }
+
+    __globalCloseRef(ref) {
+
+        // let/const/class declarations should be resolved statically.
+        // others should be resolved dynamically.
+        if (this.__shouldStaticallyCloseForGlobal(ref)) {
+            this.__staticCloseRef(ref);
+        } else {
+            this.__dynamicCloseRef(ref);
+        }
+    }
+
+    __close(scopeManager) {
+        let closeRef;
+
+        if (this.__shouldStaticallyClose(scopeManager)) {
+            closeRef = this.__staticCloseRef;
+        } else if (this.type !== "global") {
+            closeRef = this.__dynamicCloseRef;
+        } else {
+            closeRef = this.__globalCloseRef;
+        }
+
+        // Try Resolving all references in this scope.
+        for (let i = 0, iz = this.__left.length; i < iz; ++i) {
+            const ref = this.__left[i];
+
+            closeRef.call(this, ref);
+        }
+        this.__left = null;
+
+        return this.upper;
+    }
+
+    // To override by function scopes.
+    // References in default parameters isn't resolved to variables which are in their function body.
+    __isValidResolution(ref, variable) { // eslint-disable-line class-methods-use-this, no-unused-vars
+        return true;
+    }
+
+    __resolve(ref) {
+        const name = ref.identifier.name;
+
+        if (!this.set.has(name)) {
+            return false;
+        }
+        const variable = this.set.get(name);
+
+        if (!this.__isValidResolution(ref, variable)) {
+            return false;
+        }
+        variable.references.push(ref);
+        variable.stack = variable.stack && ref.from.variableScope === this.variableScope;
+        if (ref.tainted) {
+            variable.tainted = true;
+            this.taints.set(variable.name, true);
+        }
+        ref.resolved = variable;
+
+        return true;
+    }
+
+    __delegateToUpperScope(ref) {
+        if (this.upper) {
+            this.upper.__left.push(ref);
+        }
+        this.through.push(ref);
+    }
+
+    __addDeclaredVariablesOfNode(variable, node) {
+        if (node === null || node === undefined) {
+            return;
+        }
+
+        let variables = this.__declaredVariables.get(node);
+
+        if (variables === null || variables === undefined) {
+            variables = [];
+            this.__declaredVariables.set(node, variables);
+        }
+        if (variables.indexOf(variable) === -1) {
+            variables.push(variable);
+        }
+    }
+
+    __defineGeneric(name, set, variables, node, def) {
+        let variable;
+
+        variable = set.get(name);
+        if (!variable) {
+            variable = new Variable(name, this);
+            set.set(name, variable);
+            variables.push(variable);
+        }
+
+        if (def) {
+            variable.defs.push(def);
+            this.__addDeclaredVariablesOfNode(variable, def.node);
+            this.__addDeclaredVariablesOfNode(variable, def.parent);
+        }
+        if (node) {
+            variable.identifiers.push(node);
+        }
+    }
+
+    __define(node, def) {
+        if (node && node.type === Syntax.Identifier) {
+            this.__defineGeneric(
+                node.name,
+                this.set,
+                this.variables,
+                node,
+                def
+            );
+        }
+    }
+
+    __referencing(node, assign, writeExpr, maybeImplicitGlobal, partial, init) {
+
+        // because Array element may be null
+        if (!node || node.type !== Syntax.Identifier) {
+            return;
+        }
+
+        // Specially handle like `this`.
+        if (node.name === "super") {
+            return;
+        }
+
+        const ref = new Reference(node, this, assign || Reference.READ, writeExpr, maybeImplicitGlobal, !!partial, !!init);
+
+        this.references.push(ref);
+        this.__left.push(ref);
+    }
+
+    __detectEval() {
+        let current = this;
+
+        this.directCallToEvalScope = true;
+        do {
+            current.dynamic = true;
+            current = current.upper;
+        } while (current);
+    }
+
+    __detectThis() {
+        this.thisFound = true;
+    }
+
+    __isClosed() {
+        return this.__left === null;
+    }
+
+    /**
+     * returns resolved {Reference}
+     * @method Scope#resolve
+     * @param {Espree.Identifier} ident - identifier to be resolved.
+     * @returns {Reference} reference
+     */
+    resolve(ident) {
+        let ref, i, iz;
+
+        assert(this.__isClosed(), "Scope should be closed.");
+        assert(ident.type === Syntax.Identifier, "Target should be identifier.");
+        for (i = 0, iz = this.references.length; i < iz; ++i) {
+            ref = this.references[i];
+            if (ref.identifier === ident) {
+                return ref;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * returns this scope is static
+     * @method Scope#isStatic
+     * @returns {boolean} static
+     */
+    isStatic() {
+        return !this.dynamic;
+    }
+
+    /**
+     * returns this scope has materialized arguments
+     * @method Scope#isArgumentsMaterialized
+     * @returns {boolean} arguemnts materialized
+     */
+    isArgumentsMaterialized() { // eslint-disable-line class-methods-use-this
+        return true;
+    }
+
+    /**
+     * returns this scope has materialized `this` reference
+     * @method Scope#isThisMaterialized
+     * @returns {boolean} this materialized
+     */
+    isThisMaterialized() { // eslint-disable-line class-methods-use-this
+        return true;
+    }
+
+    isUsedName(name) {
+        if (this.set.has(name)) {
+            return true;
+        }
+        for (let i = 0, iz = this.through.length; i < iz; ++i) {
+            if (this.through[i].identifier.name === name) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
+
+class GlobalScope extends Scope {
+    constructor(scopeManager, block) {
+        super(scopeManager, "global", null, block, false);
+        this.implicit = {
+            set: new Map(),
+            variables: [],
+
+            /**
+            * List of {@link Reference}s that are left to be resolved (i.e. which
+            * need to be linked to the variable they refer to).
+            * @member {Reference[]} Scope#implicit#left
+            */
+            left: []
+        };
+    }
+
+    __close(scopeManager) {
+        const implicit = [];
+
+        for (let i = 0, iz = this.__left.length; i < iz; ++i) {
+            const ref = this.__left[i];
+
+            if (ref.__maybeImplicitGlobal && !this.set.has(ref.identifier.name)) {
+                implicit.push(ref.__maybeImplicitGlobal);
+            }
+        }
+
+        // create an implicit global variable from assignment expression
+        for (let i = 0, iz = implicit.length; i < iz; ++i) {
+            const info = implicit[i];
+
+            this.__defineImplicit(info.pattern,
+                new Definition(
+                    Variable.ImplicitGlobalVariable,
+                    info.pattern,
+                    info.node,
+                    null,
+                    null,
+                    null
+                ));
+
+        }
+
+        this.implicit.left = this.__left;
+
+        return super.__close(scopeManager);
+    }
+
+    __defineImplicit(node, def) {
+        if (node && node.type === Syntax.Identifier) {
+            this.__defineGeneric(
+                node.name,
+                this.implicit.set,
+                this.implicit.variables,
+                node,
+                def
+            );
+        }
+    }
+}
+
+class ModuleScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "module", upperScope, block, false);
+    }
+}
+
+class FunctionExpressionNameScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "function-expression-name", upperScope, block, false);
+        this.__define(block.id,
+            new Definition(
+                Variable.FunctionName,
+                block.id,
+                block,
+                null,
+                null,
+                null
+            ));
+        this.functionExpressionScope = true;
+    }
+}
+
+class CatchScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "catch", upperScope, block, false);
+    }
+}
+
+class WithScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "with", upperScope, block, false);
+    }
+
+    __close(scopeManager) {
+        if (this.__shouldStaticallyClose(scopeManager)) {
+            return super.__close(scopeManager);
+        }
+
+        for (let i = 0, iz = this.__left.length; i < iz; ++i) {
+            const ref = this.__left[i];
+
+            ref.tainted = true;
+            this.__delegateToUpperScope(ref);
+        }
+        this.__left = null;
+
+        return this.upper;
+    }
+}
+
+class BlockScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "block", upperScope, block, false);
+    }
+}
+
+class SwitchScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "switch", upperScope, block, false);
+    }
+}
+
+class FunctionScope extends Scope {
+    constructor(scopeManager, upperScope, block, isMethodDefinition) {
+        super(scopeManager, "function", upperScope, block, isMethodDefinition);
+
+        // section 9.2.13, FunctionDeclarationInstantiation.
+        // NOTE Arrow functions never have an arguments objects.
+        if (this.block.type !== Syntax.ArrowFunctionExpression) {
+            this.__defineArguments();
+        }
+    }
+
+    isArgumentsMaterialized() {
+
+        // TODO(Constellation)
+        // We can more aggressive on this condition like this.
+        //
+        // function t() {
+        //     // arguments of t is always hidden.
+        //     function arguments() {
+        //     }
+        // }
+        if (this.block.type === Syntax.ArrowFunctionExpression) {
+            return false;
+        }
+
+        if (!this.isStatic()) {
+            return true;
+        }
+
+        const variable = this.set.get("arguments");
+
+        assert(variable, "Always have arguments variable.");
+        return variable.tainted || variable.references.length !== 0;
+    }
+
+    isThisMaterialized() {
+        if (!this.isStatic()) {
+            return true;
+        }
+        return this.thisFound;
+    }
+
+    __defineArguments() {
+        this.__defineGeneric(
+            "arguments",
+            this.set,
+            this.variables,
+            null,
+            null
+        );
+        this.taints.set("arguments", true);
+    }
+
+    // References in default parameters isn't resolved to variables which are in their function body.
+    //     const x = 1
+    //     function f(a = x) { // This `x` is resolved to the `x` in the outer scope.
+    //         const x = 2
+    //         console.log(a)
+    //     }
+    __isValidResolution(ref, variable) {
+
+        // If `options.nodejsScope` is true, `this.block` becomes a Program node.
+        if (this.block.type === "Program") {
+            return true;
+        }
+
+        const bodyStart = this.block.body.range[0];
+
+        // It's invalid resolution in the following case:
+        return !(
+            variable.scope === this &&
+            ref.identifier.range[0] < bodyStart && // the reference is in the parameter part.
+            variable.defs.every(d => d.name.range[0] >= bodyStart) // the variable is in the body.
+        );
+    }
+}
+
+class ForScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "for", upperScope, block, false);
+    }
+}
+
+class ClassScope extends Scope {
+    constructor(scopeManager, upperScope, block) {
+        super(scopeManager, "class", upperScope, block, false);
+    }
+}
+
+module.exports = {
+    Scope,
+    GlobalScope,
+    ModuleScope,
+    FunctionExpressionNameScope,
+    CatchScope,
+    WithScope,
+    BlockScope,
+    SwitchScope,
+    FunctionScope,
+    ForScope,
+    ClassScope
+};
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/lib/variable.js b/src/node_modules/eslint-scope/lib/variable.js
new file mode 100644
index 0000000..702c478
--- /dev/null
+++ b/src/node_modules/eslint-scope/lib/variable.js
@@ -0,0 +1,88 @@
+/*
+  Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+"use strict";
+
+/**
+ * A Variable represents a locally scoped identifier. These include arguments to
+ * functions.
+ * @class Variable
+ */
+class Variable {
+    constructor(name, scope) {
+
+        /**
+         * The variable name, as given in the source code.
+         * @member {String} Variable#name
+         */
+        this.name = name;
+
+        /**
+         * List of defining occurrences of this variable (like in 'var ...'
+         * statements or as parameter), as AST nodes.
+         * @member {espree.Identifier[]} Variable#identifiers
+         */
+        this.identifiers = [];
+
+        /**
+         * List of {@link Reference|references} of this variable (excluding parameter entries)
+         * in its defining scope and all nested scopes. For defining
+         * occurrences only see {@link Variable#defs}.
+         * @member {Reference[]} Variable#references
+         */
+        this.references = [];
+
+        /**
+         * List of defining occurrences of this variable (like in 'var ...'
+         * statements or as parameter), as custom objects.
+         * @member {Definition[]} Variable#defs
+         */
+        this.defs = [];
+
+        this.tainted = false;
+
+        /**
+         * Whether this is a stack variable.
+         * @member {boolean} Variable#stack
+         */
+        this.stack = true;
+
+        /**
+         * Reference to the enclosing Scope.
+         * @member {Scope} Variable#scope
+         */
+        this.scope = scope;
+    }
+}
+
+Variable.CatchClause = "CatchClause";
+Variable.Parameter = "Parameter";
+Variable.FunctionName = "FunctionName";
+Variable.ClassName = "ClassName";
+Variable.Variable = "Variable";
+Variable.ImportBinding = "ImportBinding";
+Variable.ImplicitGlobalVariable = "ImplicitGlobalVariable";
+
+module.exports = Variable;
+
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/.jshintrc b/src/node_modules/eslint-scope/node_modules/estraverse/.jshintrc
new file mode 100644
index 0000000..f642dae
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/.jshintrc
@@ -0,0 +1,16 @@
+{
+  "curly": true,
+  "eqeqeq": true,
+  "immed": true,
+  "eqnull": true,
+  "latedef": true,
+  "noarg": true,
+  "noempty": true,
+  "quotmark": "single",
+  "undef": true,
+  "unused": true,
+  "strict": true,
+  "trailing": true,
+
+  "node": true
+}
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/LICENSE.BSD b/src/node_modules/eslint-scope/node_modules/estraverse/LICENSE.BSD
new file mode 100644
index 0000000..3e580c3
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/LICENSE.BSD
@@ -0,0 +1,19 @@
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/README.md b/src/node_modules/eslint-scope/node_modules/estraverse/README.md
new file mode 100644
index 0000000..ccd3377
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/README.md
@@ -0,0 +1,153 @@
+### Estraverse [![Build Status](https://secure.travis-ci.org/estools/estraverse.svg)](http://travis-ci.org/estools/estraverse)
+
+Estraverse ([estraverse](http://github.com/estools/estraverse)) is
+[ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
+traversal functions from [esmangle project](http://github.com/estools/esmangle).
+
+### Documentation
+
+You can find usage docs at [wiki page](https://github.com/estools/estraverse/wiki/Usage).
+
+### Example Usage
+
+The following code will output all variables declared at the root of a file.
+
+```javascript
+estraverse.traverse(ast, {
+    enter: function (node, parent) {
+        if (node.type == 'FunctionExpression' || node.type == 'FunctionDeclaration')
+            return estraverse.VisitorOption.Skip;
+    },
+    leave: function (node, parent) {
+        if (node.type == 'VariableDeclarator')
+          console.log(node.id.name);
+    }
+});
+```
+
+We can use `this.skip`, `this.remove` and `this.break` functions instead of using Skip, Remove and Break.
+
+```javascript
+estraverse.traverse(ast, {
+    enter: function (node) {
+        this.break();
+    }
+});
+```
+
+And estraverse provides `estraverse.replace` function. When returning node from `enter`/`leave`, current node is replaced with it.
+
+```javascript
+result = estraverse.replace(tree, {
+    enter: function (node) {
+        // Replace it with replaced.
+        if (node.type === 'Literal')
+            return replaced;
+    }
+});
+```
+
+By passing `visitor.keys` mapping, we can extend estraverse traversing functionality.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Extending the existing traversing rules.
+    keys: {
+        // TargetNodeName: [ 'keys', 'containing', 'the', 'other', '**node**' ]
+        TestExpression: ['argument']
+    }
+});
+```
+
+By passing `visitor.fallback` option, we can control the behavior when encountering unknown nodes.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Iterating the child **nodes** of unknown nodes.
+    fallback: 'iteration'
+});
+```
+
+When `visitor.fallback` is a function, we can determine which keys to visit on each node.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Skip the `argument` property of each node
+    fallback: function(node) {
+        return Object.keys(node).filter(function(key) {
+            return key !== 'argument';
+        });
+    }
+});
+```
+
+### License
+
+Copyright (C) 2012-2016 [Yusuke Suzuki](http://github.com/Constellation)
+ (twitter: [@Constellation](http://twitter.com/Constellation)) and other contributors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/estraverse.js b/src/node_modules/eslint-scope/node_modules/estraverse/estraverse.js
new file mode 100644
index 0000000..b106d38
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/estraverse.js
@@ -0,0 +1,782 @@
+/*
+  Copyright (C) 2012-2013 Yusuke Suzuki <utatane.tea@gmail.com>
+  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/*jslint vars:false, bitwise:true*/
+/*jshint indent:4*/
+/*global exports:true*/
+(function clone(exports) {
+    'use strict';
+
+    var Syntax,
+        VisitorOption,
+        VisitorKeys,
+        BREAK,
+        SKIP,
+        REMOVE;
+
+    function deepCopy(obj) {
+        var ret = {}, key, val;
+        for (key in obj) {
+            if (obj.hasOwnProperty(key)) {
+                val = obj[key];
+                if (typeof val === 'object' && val !== null) {
+                    ret[key] = deepCopy(val);
+                } else {
+                    ret[key] = val;
+                }
+            }
+        }
+        return ret;
+    }
+
+    // based on LLVM libc++ upper_bound / lower_bound
+    // MIT License
+
+    function upperBound(array, func) {
+        var diff, len, i, current;
+
+        len = array.length;
+        i = 0;
+
+        while (len) {
+            diff = len >>> 1;
+            current = i + diff;
+            if (func(array[current])) {
+                len = diff;
+            } else {
+                i = current + 1;
+                len -= diff + 1;
+            }
+        }
+        return i;
+    }
+
+    Syntax = {
+        AssignmentExpression: 'AssignmentExpression',
+        AssignmentPattern: 'AssignmentPattern',
+        ArrayExpression: 'ArrayExpression',
+        ArrayPattern: 'ArrayPattern',
+        ArrowFunctionExpression: 'ArrowFunctionExpression',
+        AwaitExpression: 'AwaitExpression', // CAUTION: It's deferred to ES7.
+        BlockStatement: 'BlockStatement',
+        BinaryExpression: 'BinaryExpression',
+        BreakStatement: 'BreakStatement',
+        CallExpression: 'CallExpression',
+        CatchClause: 'CatchClause',
+        ClassBody: 'ClassBody',
+        ClassDeclaration: 'ClassDeclaration',
+        ClassExpression: 'ClassExpression',
+        ComprehensionBlock: 'ComprehensionBlock',  // CAUTION: It's deferred to ES7.
+        ComprehensionExpression: 'ComprehensionExpression',  // CAUTION: It's deferred to ES7.
+        ConditionalExpression: 'ConditionalExpression',
+        ContinueStatement: 'ContinueStatement',
+        DebuggerStatement: 'DebuggerStatement',
+        DirectiveStatement: 'DirectiveStatement',
+        DoWhileStatement: 'DoWhileStatement',
+        EmptyStatement: 'EmptyStatement',
+        ExportAllDeclaration: 'ExportAllDeclaration',
+        ExportDefaultDeclaration: 'ExportDefaultDeclaration',
+        ExportNamedDeclaration: 'ExportNamedDeclaration',
+        ExportSpecifier: 'ExportSpecifier',
+        ExpressionStatement: 'ExpressionStatement',
+        ForStatement: 'ForStatement',
+        ForInStatement: 'ForInStatement',
+        ForOfStatement: 'ForOfStatement',
+        FunctionDeclaration: 'FunctionDeclaration',
+        FunctionExpression: 'FunctionExpression',
+        GeneratorExpression: 'GeneratorExpression',  // CAUTION: It's deferred to ES7.
+        Identifier: 'Identifier',
+        IfStatement: 'IfStatement',
+        ImportExpression: 'ImportExpression',
+        ImportDeclaration: 'ImportDeclaration',
+        ImportDefaultSpecifier: 'ImportDefaultSpecifier',
+        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
+        ImportSpecifier: 'ImportSpecifier',
+        Literal: 'Literal',
+        LabeledStatement: 'LabeledStatement',
+        LogicalExpression: 'LogicalExpression',
+        MemberExpression: 'MemberExpression',
+        MetaProperty: 'MetaProperty',
+        MethodDefinition: 'MethodDefinition',
+        ModuleSpecifier: 'ModuleSpecifier',
+        NewExpression: 'NewExpression',
+        ObjectExpression: 'ObjectExpression',
+        ObjectPattern: 'ObjectPattern',
+        Program: 'Program',
+        Property: 'Property',
+        RestElement: 'RestElement',
+        ReturnStatement: 'ReturnStatement',
+        SequenceExpression: 'SequenceExpression',
+        SpreadElement: 'SpreadElement',
+        Super: 'Super',
+        SwitchStatement: 'SwitchStatement',
+        SwitchCase: 'SwitchCase',
+        TaggedTemplateExpression: 'TaggedTemplateExpression',
+        TemplateElement: 'TemplateElement',
+        TemplateLiteral: 'TemplateLiteral',
+        ThisExpression: 'ThisExpression',
+        ThrowStatement: 'ThrowStatement',
+        TryStatement: 'TryStatement',
+        UnaryExpression: 'UnaryExpression',
+        UpdateExpression: 'UpdateExpression',
+        VariableDeclaration: 'VariableDeclaration',
+        VariableDeclarator: 'VariableDeclarator',
+        WhileStatement: 'WhileStatement',
+        WithStatement: 'WithStatement',
+        YieldExpression: 'YieldExpression'
+    };
+
+    VisitorKeys = {
+        AssignmentExpression: ['left', 'right'],
+        AssignmentPattern: ['left', 'right'],
+        ArrayExpression: ['elements'],
+        ArrayPattern: ['elements'],
+        ArrowFunctionExpression: ['params', 'body'],
+        AwaitExpression: ['argument'], // CAUTION: It's deferred to ES7.
+        BlockStatement: ['body'],
+        BinaryExpression: ['left', 'right'],
+        BreakStatement: ['label'],
+        CallExpression: ['callee', 'arguments'],
+        CatchClause: ['param', 'body'],
+        ClassBody: ['body'],
+        ClassDeclaration: ['id', 'superClass', 'body'],
+        ClassExpression: ['id', 'superClass', 'body'],
+        ComprehensionBlock: ['left', 'right'],  // CAUTION: It's deferred to ES7.
+        ComprehensionExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        ConditionalExpression: ['test', 'consequent', 'alternate'],
+        ContinueStatement: ['label'],
+        DebuggerStatement: [],
+        DirectiveStatement: [],
+        DoWhileStatement: ['body', 'test'],
+        EmptyStatement: [],
+        ExportAllDeclaration: ['source'],
+        ExportDefaultDeclaration: ['declaration'],
+        ExportNamedDeclaration: ['declaration', 'specifiers', 'source'],
+        ExportSpecifier: ['exported', 'local'],
+        ExpressionStatement: ['expression'],
+        ForStatement: ['init', 'test', 'update', 'body'],
+        ForInStatement: ['left', 'right', 'body'],
+        ForOfStatement: ['left', 'right', 'body'],
+        FunctionDeclaration: ['id', 'params', 'body'],
+        FunctionExpression: ['id', 'params', 'body'],
+        GeneratorExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        Identifier: [],
+        IfStatement: ['test', 'consequent', 'alternate'],
+        ImportExpression: ['source'],
+        ImportDeclaration: ['specifiers', 'source'],
+        ImportDefaultSpecifier: ['local'],
+        ImportNamespaceSpecifier: ['local'],
+        ImportSpecifier: ['imported', 'local'],
+        Literal: [],
+        LabeledStatement: ['label', 'body'],
+        LogicalExpression: ['left', 'right'],
+        MemberExpression: ['object', 'property'],
+        MetaProperty: ['meta', 'property'],
+        MethodDefinition: ['key', 'value'],
+        ModuleSpecifier: [],
+        NewExpression: ['callee', 'arguments'],
+        ObjectExpression: ['properties'],
+        ObjectPattern: ['properties'],
+        Program: ['body'],
+        Property: ['key', 'value'],
+        RestElement: [ 'argument' ],
+        ReturnStatement: ['argument'],
+        SequenceExpression: ['expressions'],
+        SpreadElement: ['argument'],
+        Super: [],
+        SwitchStatement: ['discriminant', 'cases'],
+        SwitchCase: ['test', 'consequent'],
+        TaggedTemplateExpression: ['tag', 'quasi'],
+        TemplateElement: [],
+        TemplateLiteral: ['quasis', 'expressions'],
+        ThisExpression: [],
+        ThrowStatement: ['argument'],
+        TryStatement: ['block', 'handler', 'finalizer'],
+        UnaryExpression: ['argument'],
+        UpdateExpression: ['argument'],
+        VariableDeclaration: ['declarations'],
+        VariableDeclarator: ['id', 'init'],
+        WhileStatement: ['test', 'body'],
+        WithStatement: ['object', 'body'],
+        YieldExpression: ['argument']
+    };
+
+    // unique id
+    BREAK = {};
+    SKIP = {};
+    REMOVE = {};
+
+    VisitorOption = {
+        Break: BREAK,
+        Skip: SKIP,
+        Remove: REMOVE
+    };
+
+    function Reference(parent, key) {
+        this.parent = parent;
+        this.key = key;
+    }
+
+    Reference.prototype.replace = function replace(node) {
+        this.parent[this.key] = node;
+    };
+
+    Reference.prototype.remove = function remove() {
+        if (Array.isArray(this.parent)) {
+            this.parent.splice(this.key, 1);
+            return true;
+        } else {
+            this.replace(null);
+            return false;
+        }
+    };
+
+    function Element(node, path, wrap, ref) {
+        this.node = node;
+        this.path = path;
+        this.wrap = wrap;
+        this.ref = ref;
+    }
+
+    function Controller() { }
+
+    // API:
+    // return property path array from root to current node
+    Controller.prototype.path = function path() {
+        var i, iz, j, jz, result, element;
+
+        function addToPath(result, path) {
+            if (Array.isArray(path)) {
+                for (j = 0, jz = path.length; j < jz; ++j) {
+                    result.push(path[j]);
+                }
+            } else {
+                result.push(path);
+            }
+        }
+
+        // root node
+        if (!this.__current.path) {
+            return null;
+        }
+
+        // first node is sentinel, second node is root element
+        result = [];
+        for (i = 2, iz = this.__leavelist.length; i < iz; ++i) {
+            element = this.__leavelist[i];
+            addToPath(result, element.path);
+        }
+        addToPath(result, this.__current.path);
+        return result;
+    };
+
+    // API:
+    // return type of current node
+    Controller.prototype.type = function () {
+        var node = this.current();
+        return node.type || this.__current.wrap;
+    };
+
+    // API:
+    // return array of parent elements
+    Controller.prototype.parents = function parents() {
+        var i, iz, result;
+
+        // first node is sentinel
+        result = [];
+        for (i = 1, iz = this.__leavelist.length; i < iz; ++i) {
+            result.push(this.__leavelist[i].node);
+        }
+
+        return result;
+    };
+
+    // API:
+    // return current node
+    Controller.prototype.current = function current() {
+        return this.__current.node;
+    };
+
+    Controller.prototype.__execute = function __execute(callback, element) {
+        var previous, result;
+
+        result = undefined;
+
+        previous  = this.__current;
+        this.__current = element;
+        this.__state = null;
+        if (callback) {
+            result = callback.call(this, element.node, this.__leavelist[this.__leavelist.length - 1].node);
+        }
+        this.__current = previous;
+
+        return result;
+    };
+
+    // API:
+    // notify control skip / break
+    Controller.prototype.notify = function notify(flag) {
+        this.__state = flag;
+    };
+
+    // API:
+    // skip child nodes of current node
+    Controller.prototype.skip = function () {
+        this.notify(SKIP);
+    };
+
+    // API:
+    // break traversals
+    Controller.prototype['break'] = function () {
+        this.notify(BREAK);
+    };
+
+    // API:
+    // remove node
+    Controller.prototype.remove = function () {
+        this.notify(REMOVE);
+    };
+
+    Controller.prototype.__initialize = function(root, visitor) {
+        this.visitor = visitor;
+        this.root = root;
+        this.__worklist = [];
+        this.__leavelist = [];
+        this.__current = null;
+        this.__state = null;
+        this.__fallback = null;
+        if (visitor.fallback === 'iteration') {
+            this.__fallback = Object.keys;
+        } else if (typeof visitor.fallback === 'function') {
+            this.__fallback = visitor.fallback;
+        }
+
+        this.__keys = VisitorKeys;
+        if (visitor.keys) {
+            this.__keys = Object.assign(Object.create(this.__keys), visitor.keys);
+        }
+    };
+
+    function isNode(node) {
+        if (node == null) {
+            return false;
+        }
+        return typeof node === 'object' && typeof node.type === 'string';
+    }
+
+    function isProperty(nodeType, key) {
+        return (nodeType === Syntax.ObjectExpression || nodeType === Syntax.ObjectPattern) && 'properties' === key;
+    }
+
+    Controller.prototype.traverse = function traverse(root, visitor) {
+        var worklist,
+            leavelist,
+            element,
+            node,
+            nodeType,
+            ret,
+            key,
+            current,
+            current2,
+            candidates,
+            candidate,
+            sentinel;
+
+        this.__initialize(root, visitor);
+
+        sentinel = {};
+
+        // reference
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+
+        // initialize
+        worklist.push(new Element(root, null, null, null));
+        leavelist.push(new Element(null, null, null, null));
+
+        while (worklist.length) {
+            element = worklist.pop();
+
+            if (element === sentinel) {
+                element = leavelist.pop();
+
+                ret = this.__execute(visitor.leave, element);
+
+                if (this.__state === BREAK || ret === BREAK) {
+                    return;
+                }
+                continue;
+            }
+
+            if (element.node) {
+
+                ret = this.__execute(visitor.enter, element);
+
+                if (this.__state === BREAK || ret === BREAK) {
+                    return;
+                }
+
+                worklist.push(sentinel);
+                leavelist.push(element);
+
+                if (this.__state === SKIP || ret === SKIP) {
+                    continue;
+                }
+
+                node = element.node;
+                nodeType = node.type || element.wrap;
+                candidates = this.__keys[nodeType];
+                if (!candidates) {
+                    if (this.__fallback) {
+                        candidates = this.__fallback(node);
+                    } else {
+                        throw new Error('Unknown node type ' + nodeType + '.');
+                    }
+                }
+
+                current = candidates.length;
+                while ((current -= 1) >= 0) {
+                    key = candidates[current];
+                    candidate = node[key];
+                    if (!candidate) {
+                        continue;
+                    }
+
+                    if (Array.isArray(candidate)) {
+                        current2 = candidate.length;
+                        while ((current2 -= 1) >= 0) {
+                            if (!candidate[current2]) {
+                                continue;
+                            }
+                            if (isProperty(nodeType, candidates[current])) {
+                                element = new Element(candidate[current2], [key, current2], 'Property', null);
+                            } else if (isNode(candidate[current2])) {
+                                element = new Element(candidate[current2], [key, current2], null, null);
+                            } else {
+                                continue;
+                            }
+                            worklist.push(element);
+                        }
+                    } else if (isNode(candidate)) {
+                        worklist.push(new Element(candidate, key, null, null));
+                    }
+                }
+            }
+        }
+    };
+
+    Controller.prototype.replace = function replace(root, visitor) {
+        var worklist,
+            leavelist,
+            node,
+            nodeType,
+            target,
+            element,
+            current,
+            current2,
+            candidates,
+            candidate,
+            sentinel,
+            outer,
+            key;
+
+        function removeElem(element) {
+            var i,
+                key,
+                nextElem,
+                parent;
+
+            if (element.ref.remove()) {
+                // When the reference is an element of an array.
+                key = element.ref.key;
+                parent = element.ref.parent;
+
+                // If removed from array, then decrease following items' keys.
+                i = worklist.length;
+                while (i--) {
+                    nextElem = worklist[i];
+                    if (nextElem.ref && nextElem.ref.parent === parent) {
+                        if  (nextElem.ref.key < key) {
+                            break;
+                        }
+                        --nextElem.ref.key;
+                    }
+                }
+            }
+        }
+
+        this.__initialize(root, visitor);
+
+        sentinel = {};
+
+        // reference
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+
+        // initialize
+        outer = {
+            root: root
+        };
+        element = new Element(root, null, null, new Reference(outer, 'root'));
+        worklist.push(element);
+        leavelist.push(element);
+
+        while (worklist.length) {
+            element = worklist.pop();
+
+            if (element === sentinel) {
+                element = leavelist.pop();
+
+                target = this.__execute(visitor.leave, element);
+
+                // node may be replaced with null,
+                // so distinguish between undefined and null in this place
+                if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+                    // replace
+                    element.ref.replace(target);
+                }
+
+                if (this.__state === REMOVE || target === REMOVE) {
+                    removeElem(element);
+                }
+
+                if (this.__state === BREAK || target === BREAK) {
+                    return outer.root;
+                }
+                continue;
+            }
+
+            target = this.__execute(visitor.enter, element);
+
+            // node may be replaced with null,
+            // so distinguish between undefined and null in this place
+            if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+                // replace
+                element.ref.replace(target);
+                element.node = target;
+            }
+
+            if (this.__state === REMOVE || target === REMOVE) {
+                removeElem(element);
+                element.node = null;
+            }
+
+            if (this.__state === BREAK || target === BREAK) {
+                return outer.root;
+            }
+
+            // node may be null
+            node = element.node;
+            if (!node) {
+                continue;
+            }
+
+            worklist.push(sentinel);
+            leavelist.push(element);
+
+            if (this.__state === SKIP || target === SKIP) {
+                continue;
+            }
+
+            nodeType = node.type || element.wrap;
+            candidates = this.__keys[nodeType];
+            if (!candidates) {
+                if (this.__fallback) {
+                    candidates = this.__fallback(node);
+                } else {
+                    throw new Error('Unknown node type ' + nodeType + '.');
+                }
+            }
+
+            current = candidates.length;
+            while ((current -= 1) >= 0) {
+                key = candidates[current];
+                candidate = node[key];
+                if (!candidate) {
+                    continue;
+                }
+
+                if (Array.isArray(candidate)) {
+                    current2 = candidate.length;
+                    while ((current2 -= 1) >= 0) {
+                        if (!candidate[current2]) {
+                            continue;
+                        }
+                        if (isProperty(nodeType, candidates[current])) {
+                            element = new Element(candidate[current2], [key, current2], 'Property', new Reference(candidate, current2));
+                        } else if (isNode(candidate[current2])) {
+                            element = new Element(candidate[current2], [key, current2], null, new Reference(candidate, current2));
+                        } else {
+                            continue;
+                        }
+                        worklist.push(element);
+                    }
+                } else if (isNode(candidate)) {
+                    worklist.push(new Element(candidate, key, null, new Reference(node, key)));
+                }
+            }
+        }
+
+        return outer.root;
+    };
+
+    function traverse(root, visitor) {
+        var controller = new Controller();
+        return controller.traverse(root, visitor);
+    }
+
+    function replace(root, visitor) {
+        var controller = new Controller();
+        return controller.replace(root, visitor);
+    }
+
+    function extendCommentRange(comment, tokens) {
+        var target;
+
+        target = upperBound(tokens, function search(token) {
+            return token.range[0] > comment.range[0];
+        });
+
+        comment.extendedRange = [comment.range[0], comment.range[1]];
+
+        if (target !== tokens.length) {
+            comment.extendedRange[1] = tokens[target].range[0];
+        }
+
+        target -= 1;
+        if (target >= 0) {
+            comment.extendedRange[0] = tokens[target].range[1];
+        }
+
+        return comment;
+    }
+
+    function attachComments(tree, providedComments, tokens) {
+        // At first, we should calculate extended comment ranges.
+        var comments = [], comment, len, i, cursor;
+
+        if (!tree.range) {
+            throw new Error('attachComments needs range information');
+        }
+
+        // tokens array is empty, we attach comments to tree as 'leadingComments'
+        if (!tokens.length) {
+            if (providedComments.length) {
+                for (i = 0, len = providedComments.length; i < len; i += 1) {
+                    comment = deepCopy(providedComments[i]);
+                    comment.extendedRange = [0, tree.range[0]];
+                    comments.push(comment);
+                }
+                tree.leadingComments = comments;
+            }
+            return tree;
+        }
+
+        for (i = 0, len = providedComments.length; i < len; i += 1) {
+            comments.push(extendCommentRange(deepCopy(providedComments[i]), tokens));
+        }
+
+        // This is based on John Freeman's implementation.
+        cursor = 0;
+        traverse(tree, {
+            enter: function (node) {
+                var comment;
+
+                while (cursor < comments.length) {
+                    comment = comments[cursor];
+                    if (comment.extendedRange[1] > node.range[0]) {
+                        break;
+                    }
+
+                    if (comment.extendedRange[1] === node.range[0]) {
+                        if (!node.leadingComments) {
+                            node.leadingComments = [];
+                        }
+                        node.leadingComments.push(comment);
+                        comments.splice(cursor, 1);
+                    } else {
+                        cursor += 1;
+                    }
+                }
+
+                // already out of owned node
+                if (cursor === comments.length) {
+                    return VisitorOption.Break;
+                }
+
+                if (comments[cursor].extendedRange[0] > node.range[1]) {
+                    return VisitorOption.Skip;
+                }
+            }
+        });
+
+        cursor = 0;
+        traverse(tree, {
+            leave: function (node) {
+                var comment;
+
+                while (cursor < comments.length) {
+                    comment = comments[cursor];
+                    if (node.range[1] < comment.extendedRange[0]) {
+                        break;
+                    }
+
+                    if (node.range[1] === comment.extendedRange[0]) {
+                        if (!node.trailingComments) {
+                            node.trailingComments = [];
+                        }
+                        node.trailingComments.push(comment);
+                        comments.splice(cursor, 1);
+                    } else {
+                        cursor += 1;
+                    }
+                }
+
+                // already out of owned node
+                if (cursor === comments.length) {
+                    return VisitorOption.Break;
+                }
+
+                if (comments[cursor].extendedRange[0] > node.range[1]) {
+                    return VisitorOption.Skip;
+                }
+            }
+        });
+
+        return tree;
+    }
+
+    exports.version = require('./package.json').version;
+    exports.Syntax = Syntax;
+    exports.traverse = traverse;
+    exports.replace = replace;
+    exports.attachComments = attachComments;
+    exports.VisitorKeys = VisitorKeys;
+    exports.VisitorOption = VisitorOption;
+    exports.Controller = Controller;
+    exports.cloneEnvironment = function () { return clone({}); };
+
+    return exports;
+}(exports));
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/gulpfile.js b/src/node_modules/eslint-scope/node_modules/estraverse/gulpfile.js
new file mode 100644
index 0000000..8772bbc
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/gulpfile.js
@@ -0,0 +1,70 @@
+/*
+  Copyright (C) 2014 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+'use strict';
+
+var gulp = require('gulp'),
+    git = require('gulp-git'),
+    bump = require('gulp-bump'),
+    filter = require('gulp-filter'),
+    tagVersion = require('gulp-tag-version');
+
+var TEST = [ 'test/*.js' ];
+var POWERED = [ 'powered-test/*.js' ];
+var SOURCE = [ 'src/**/*.js' ];
+
+/**
+ * Bumping version number and tagging the repository with it.
+ * Please read http://semver.org/
+ *
+ * You can use the commands
+ *
+ *     gulp patch     # makes v0.1.0 -> v0.1.1
+ *     gulp feature   # makes v0.1.1 -> v0.2.0
+ *     gulp release   # makes v0.2.1 -> v1.0.0
+ *
+ * To bump the version numbers accordingly after you did a patch,
+ * introduced a feature or made a backwards-incompatible release.
+ */
+
+function inc(importance) {
+    // get all the files to bump version in
+    return gulp.src(['./package.json'])
+        // bump the version number in those files
+        .pipe(bump({type: importance}))
+        // save it back to filesystem
+        .pipe(gulp.dest('./'))
+        // commit the changed version number
+        .pipe(git.commit('Bumps package version'))
+        // read only one file to get the version number
+        .pipe(filter('package.json'))
+        // **tag it in the repository**
+        .pipe(tagVersion({
+            prefix: ''
+        }));
+}
+
+gulp.task('patch', [ ], function () { return inc('patch'); })
+gulp.task('minor', [ ], function () { return inc('minor'); })
+gulp.task('major', [ ], function () { return inc('major'); })
diff --git a/src/node_modules/eslint-scope/node_modules/estraverse/package.json b/src/node_modules/eslint-scope/node_modules/estraverse/package.json
new file mode 100644
index 0000000..1138238
--- /dev/null
+++ b/src/node_modules/eslint-scope/node_modules/estraverse/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "estraverse",
+  "description": "ECMAScript JS AST traversal functions",
+  "homepage": "https://github.com/estools/estraverse",
+  "main": "estraverse.js",
+  "version": "4.3.0",
+  "engines": {
+    "node": ">=4.0"
+  },
+  "maintainers": [
+    {
+      "name": "Yusuke Suzuki",
+      "email": "utatane.tea@gmail.com",
+      "web": "http://github.com/Constellation"
+    }
+  ],
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/estools/estraverse.git"
+  },
+  "devDependencies": {
+    "babel-preset-env": "^1.6.1",
+    "babel-register": "^6.3.13",
+    "chai": "^2.1.1",
+    "espree": "^1.11.0",
+    "gulp": "^3.8.10",
+    "gulp-bump": "^0.2.2",
+    "gulp-filter": "^2.0.0",
+    "gulp-git": "^1.0.1",
+    "gulp-tag-version": "^1.3.0",
+    "jshint": "^2.5.6",
+    "mocha": "^2.1.0"
+  },
+  "license": "BSD-2-Clause",
+  "scripts": {
+    "test": "npm run-script lint && npm run-script unit-test",
+    "lint": "jshint estraverse.js",
+    "unit-test": "mocha --compilers js:babel-register"
+  }
+}
diff --git a/src/node_modules/eslint-scope/package.json b/src/node_modules/eslint-scope/package.json
new file mode 100644
index 0000000..b700b92
--- /dev/null
+++ b/src/node_modules/eslint-scope/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "eslint-scope",
+  "description": "ECMAScript scope analyzer for ESLint",
+  "homepage": "http://github.com/eslint/eslint-scope",
+  "main": "lib/index.js",
+  "version": "5.1.1",
+  "engines": {
+    "node": ">=8.0.0"
+  },
+  "repository": "eslint/eslint-scope",
+  "bugs": {
+    "url": "https://github.com/eslint/eslint-scope/issues"
+  },
+  "license": "BSD-2-Clause",
+  "scripts": {
+    "test": "node Makefile.js test",
+    "lint": "node Makefile.js lint",
+    "generate-release": "eslint-generate-release",
+    "generate-alpharelease": "eslint-generate-prerelease alpha",
+    "generate-betarelease": "eslint-generate-prerelease beta",
+    "generate-rcrelease": "eslint-generate-prerelease rc",
+    "publish-release": "eslint-publish-release"
+  },
+  "files": [
+    "LICENSE",
+    "README.md",
+    "lib"
+  ],
+  "dependencies": {
+    "esrecurse": "^4.3.0",
+    "estraverse": "^4.1.1"
+  },
+  "devDependencies": {
+    "@typescript-eslint/parser": "^1.11.0",
+    "chai": "^4.2.0",
+    "eslint": "^6.0.1",
+    "eslint-config-eslint": "^5.0.1",
+    "eslint-plugin-node": "^9.1.0",
+    "eslint-release": "^1.0.0",
+    "eslint-visitor-keys": "^1.2.0",
+    "espree": "^7.1.0",
+    "istanbul": "^0.4.5",
+    "mocha": "^6.1.4",
+    "npm-license": "^0.3.3",
+    "shelljs": "^0.8.3",
+    "typescript": "^3.5.2"
+  }
+}