Bump to v4.12.0.

_hashHas.js

@@ -13,12 +13,14 @@ define(['./_nativeCreate'], function(nativeCreate) {
    * Checks if a hash value for `key` exists.
    *
    * @private
-   * @param {Object} hash The hash to query.
+   * @name has
+   * @memberOf Hash
    * @param {string} key The key of the entry to check.
    * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
    */
-  function hashHas(hash, key) {
-    return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
+  function hashHas(key) {
+    var data = this.__data__;
+    return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
   }
 
   return hashHas;