Bump to v4.1.0.

lodash.functions/index.js

@@ -1,18 +1,41 @@
 /**
- * lodash 4.0.1 (Custom Build) <https://lodash.com/>
+ * lodash 4.1.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <https://lodash.com/license>
  */
-var arrayFilter = require('lodash._arrayfilter'),
-    keys = require('lodash.keys');
+var keys = require('lodash.keys');
 
 /** `Object#toString` result references. */
 var funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]';
 
+/**
+ * A specialized version of `_.filter` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ */
+function arrayFilter(array, predicate) {
+  var index = -1,
+      length = array.length,
+      resIndex = -1,
+      result = [];
+
+  while (++index < length) {
+    var value = array[index];
+    if (predicate(value, index, array)) {
+      result[++resIndex] = value;
+    }
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
 var objectProto = Object.prototype;