deps: upgrade npm to 3.9.3

Contains the following npm releases:
- v3.9.0: https://github.com/npm/npm/releases/tag/v3.9.0
- v3.9.1: https://github.com/npm/npm/releases/tag/v3.9.1
- v3.9.2: https://github.com/npm/npm/releases/tag/v3.9.2
- v3.9.3: https://github.com/npm/npm/releases/tag/v3.9.3

PR-URL: https://github.com/nodejs/node/pull/7030
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 22 insertions, 19 deletions

diff --git a/deps/npm/node_modules/lodash.keys/index.js b/deps/npm/node_modules/lodash.keys/index.js
index 5861b0ffe3..39530dfc6f 100644
--- a/deps/npm/node_modules/lodash.keys/index.js
+++ b/deps/npm/node_modules/lodash.keys/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.0.6 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -38,20 +38,6 @@ function baseTimes(n, iteratee) {
   return result;
 }
 
-/**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
-function isIndex(value, length) {
-  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
-  length = length == null ? MAX_SAFE_INTEGER : length;
-  return value > -1 && value % 1 == 0 && value < length;
-}
-
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
@@ -59,7 +45,8 @@ var objectProto = Object.prototype;
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -104,7 +91,7 @@ function baseKeys(object) {
  *
  * @private
  * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new accessor function.
  */
 function baseProperty(key) {
   return function(object) {
@@ -154,6 +141,21 @@ function indexKeys(object) {
 }
 
 /**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
  * Checks if `value` is likely a prototype object.
  *
  * @private
@@ -335,8 +337,9 @@ function isLength(value) {
 }
 
 /**
- * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
- * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
  * @memberOf _