Bump to v4.16.5.

isSymbol.js

@@ -1,18 +1,8 @@
-define(['./isObjectLike'], function(isObjectLike) {
+define(['./_baseGetTag', './isObjectLike'], function(baseGetTag, isObjectLike) {
 
   /** `Object#toString` result references. */
   var symbolTag = '[object Symbol]';
 
-  /** Used for built-in method references. */
-  var objectProto = Object.prototype;
-
-  /**
-   * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-   * of values.
-   */
-  var objectToString = objectProto.toString;
-
   /**
    * Checks if `value` is classified as a `Symbol` primitive or object.
    *
@@ -32,7 +22,7 @@ define(['./isObjectLike'], function(isObjectLike) {
    */
   function isSymbol(value) {
     return typeof value == 'symbol' ||
-      (isObjectLike(value) && objectToString.call(value) == symbolTag);
+      (isObjectLike(value) && baseGetTag(value) == symbolTag);
   }
 
   return isSymbol;