Bump to v4.7.0.

_getSymbols.js

@@ -4,15 +4,24 @@ define([], function() {
   var getOwnPropertySymbols = Object.getOwnPropertySymbols;
 
   /**
-   * Creates an array of the own symbol properties of `object`.
+   * Creates an array of the own enumerable symbol properties of `object`.
    *
    * @private
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of symbols.
    */
-  var getSymbols = getOwnPropertySymbols || function() {
-    return [];
-  };
+  function getSymbols(object) {
+    // Coerce `object` to an object to avoid non-object errors in V8.
+    // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details.
+    return getOwnPropertySymbols(Object(object));
+  }
+
+  // Fallback for IE < 11.
+  if (!getOwnPropertySymbols) {
+    getSymbols = function() {
+      return [];
+    };
+  }
 
   return getSymbols;
 });