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diff --git a/node_modules/nan/nan_persistent_pre_12_inl.h b/node_modules/nan/nan_persistent_pre_12_inl.h
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+/*********************************************************************
+ * NAN - Native Abstractions for Node.js
+ *
+ * Copyright (c) 2018 NAN contributors
+ *
+ * MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
+ ********************************************************************/
+
+#ifndef NAN_PERSISTENT_PRE_12_INL_H_
+#define NAN_PERSISTENT_PRE_12_INL_H_
+
+template<typename T>
+class PersistentBase {
+  v8::Persistent<T> persistent;
+  template<typename U>
+  friend v8::Local<U> New(const PersistentBase<U> &p);
+  template<typename U, typename M>
+  friend v8::Local<U> New(const Persistent<U, M> &p);
+  template<typename U>
+  friend v8::Local<U> New(const Global<U> &p);
+  template<typename S> friend class ReturnValue;
+
+ public:
+  inline PersistentBase() :
+      persistent() {}
+
+  inline void Reset() {
+    persistent.Dispose();
+    persistent.Clear();
+  }
+
+  template<typename S>
+  inline void Reset(const v8::Local<S> &other) {
+    TYPE_CHECK(T, S);
+
+    if (!persistent.IsEmpty()) {
+      persistent.Dispose();
+    }
+
+    if (other.IsEmpty()) {
+      persistent.Clear();
+    } else {
+      persistent = v8::Persistent<T>::New(other);
+    }
+  }
+
+  template<typename S>
+  inline void Reset(const PersistentBase<S> &other) {
+    TYPE_CHECK(T, S);
+
+    if (!persistent.IsEmpty()) {
+      persistent.Dispose();
+    }
+
+    if (other.IsEmpty()) {
+      persistent.Clear();
+    } else {
+      persistent = v8::Persistent<T>::New(other.persistent);
+    }
+  }
+
+  inline bool IsEmpty() const { return persistent.IsEmpty(); }
+
+  inline void Empty() { persistent.Clear(); }
+
+  template<typename S>
+  inline bool operator==(const PersistentBase<S> &that) const {
+    return this->persistent == that.persistent;
+  }
+
+  template<typename S>
+  inline bool operator==(const v8::Local<S> &that) const {
+    return this->persistent == that;
+  }
+
+  template<typename S>
+  inline bool operator!=(const PersistentBase<S> &that) const {
+    return !operator==(that);
+  }
+
+  template<typename S>
+  inline bool operator!=(const v8::Local<S> &that) const {
+    return !operator==(that);
+  }
+
+  template<typename P>
+  inline void SetWeak(
+    P *parameter
+    , typename WeakCallbackInfo<P>::Callback callback
+    , WeakCallbackType type);
+
+  inline void ClearWeak() { persistent.ClearWeak(); }
+
+  inline void MarkIndependent() { persistent.MarkIndependent(); }
+
+  inline bool IsIndependent() const { return persistent.IsIndependent(); }
+
+  inline bool IsNearDeath() const { return persistent.IsNearDeath(); }
+
+  inline bool IsWeak() const { return persistent.IsWeak(); }
+
+ private:
+  inline explicit PersistentBase(v8::Persistent<T> that) :
+      persistent(that) { }
+  inline explicit PersistentBase(T *val) : persistent(val) {}
+  template<typename S, typename M> friend class Persistent;
+  template<typename S> friend class Global;
+  friend class ObjectWrap;
+};
+
+template<typename T>
+class NonCopyablePersistentTraits {
+ public:
+  typedef Persistent<T, NonCopyablePersistentTraits<T> >
+      NonCopyablePersistent;
+  static const bool kResetInDestructor = false;
+  template<typename S, typename M>
+  inline static void Copy(const Persistent<S, M> &source,
+                             NonCopyablePersistent *dest) {
+    Uncompilable<v8::Object>();
+  }
+
+  template<typename O> inline static void Uncompilable() {
+    TYPE_CHECK(O, v8::Primitive);
+  }
+};
+
+template<typename T>
+struct CopyablePersistentTraits {
+  typedef Persistent<T, CopyablePersistentTraits<T> > CopyablePersistent;
+  static const bool kResetInDestructor = true;
+  template<typename S, typename M>
+  static inline void Copy(const Persistent<S, M> &source,
+                             CopyablePersistent *dest) {}
+};
+
+template<typename T, typename M> class Persistent :
+    public PersistentBase<T> {
+ public:
+  inline Persistent() {}
+
+  template<typename S> inline Persistent(v8::Handle<S> that)
+      : PersistentBase<T>(v8::Persistent<T>::New(that)) {
+    TYPE_CHECK(T, S);
+  }
+
+  inline Persistent(const Persistent &that) : PersistentBase<T>() {
+    Copy(that);
+  }
+
+  template<typename S, typename M2>
+  inline Persistent(const Persistent<S, M2> &that) :
+      PersistentBase<T>() {
+    Copy(that);
+  }
+
+  inline Persistent &operator=(const Persistent &that) {
+    Copy(that);
+    return *this;
+  }
+
+  template <class S, class M2>
+  inline Persistent &operator=(const Persistent<S, M2> &that) {
+    Copy(that);
+    return *this;
+  }
+
+  inline ~Persistent() {
+    if (M::kResetInDestructor) this->Reset();
+  }
+
+ private:
+  inline T *operator*() const { return *PersistentBase<T>::persistent; }
+
+  template<typename S, typename M2>
+  inline void Copy(const Persistent<S, M2> &that) {
+    TYPE_CHECK(T, S);
+
+    this->Reset();
+
+    if (!that.IsEmpty()) {
+      this->persistent = v8::Persistent<T>::New(that.persistent);
+      M::Copy(that, this);
+    }
+  }
+};
+
+template<typename T>
+class Global : public PersistentBase<T> {
+  struct RValue {
+    inline explicit RValue(Global* obj) : object(obj) {}
+    Global* object;
+  };
+
+ public:
+  inline Global() : PersistentBase<T>(0) { }
+
+  template <typename S>
+  inline Global(v8::Local<S> that)  // NOLINT(runtime/explicit)
+      : PersistentBase<T>(v8::Persistent<T>::New(that)) {
+    TYPE_CHECK(T, S);
+  }
+
+  template <typename S>
+  inline Global(const PersistentBase<S> &that)  // NOLINT(runtime/explicit)
+    : PersistentBase<T>(that) {
+    TYPE_CHECK(T, S);
+  }
+  /**
+   * Move constructor.
+   */
+  inline Global(RValue rvalue)  // NOLINT(runtime/explicit)
+    : PersistentBase<T>(rvalue.object->persistent) {
+    rvalue.object->Reset();
+  }
+  inline ~Global() { this->Reset(); }
+  /**
+   * Move via assignment.
+   */
+  template<typename S>
+  inline Global &operator=(Global<S> rhs) {
+    TYPE_CHECK(T, S);
+    this->Reset(rhs.persistent);
+    rhs.Reset();
+    return *this;
+  }
+  /**
+   * Cast operator for moves.
+   */
+  inline operator RValue() { return RValue(this); }
+  /**
+   * Pass allows returning uniques from functions, etc.
+   */
+  Global Pass() { return Global(RValue(this)); }
+
+ private:
+  Global(Global &);
+  void operator=(Global &);
+  template<typename S> friend class ReturnValue;
+};
+
+#endif  // NAN_PERSISTENT_PRE_12_INL_H_