Bump to v4.13.0.

_root.js

@@ -1,45 +1,16 @@
 define(['./_checkGlobal'], function(checkGlobal) {
 
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
-
-  /** Used to determine if values are of the language type `Object`. */
-  var objectTypes = {
-    'function': true,
-    'object': true
-  };
-
-  /** Detect free variable `exports`. */
-  var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-    ? exports
-    : undefined;
-
-  /** Detect free variable `module`. */
-  var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-    ? module
-    : undefined;
-
   /** Detect free variable `global` from Node.js. */
-  var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+  var freeGlobal = checkGlobal(typeof global == 'object' && global);
 
   /** Detect free variable `self`. */
-  var freeSelf = checkGlobal(objectTypes[typeof self] && self);
-
-  /** Detect free variable `window`. */
-  var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+  var freeSelf = checkGlobal(typeof self == 'object' && self);
 
   /** Detect `this` as the global object. */
-  var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+  var thisGlobal = checkGlobal(typeof this == 'object' && this);
 
-  /**
-   * Used as a reference to the global object.
-   *
-   * The `this` value is used if it's the global object to avoid Greasemonkey's
-   * restricted `window` object, otherwise the `window` object is used.
-   */
-  var root = freeGlobal ||
-    ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
-      freeSelf || thisGlobal || Function('return this')();
+  /** Used as a reference to the global object. */
+  var root = freeGlobal || freeSelf || thisGlobal || Function('return this')();
 
   return root;
 });