Bump to v4.1.0.

_mapSet.js

@@ -0,0 +1,26 @@
+define(['./_Map', './_assocSet', './_hashSet', './_isKeyable'], function(Map, assocSet, hashSet, isKeyable) {
+
+  /**
+   * Sets the map `key` to `value`.
+   *
+   * @private
+   * @name set
+   * @memberOf MapCache
+   * @param {string} key The key of the value to set.
+   * @param {*} value The value to set.
+   * @returns {Object} Returns the map cache object.
+   */
+  function mapSet(key, value) {
+    var data = this.__data__;
+    if (isKeyable(key)) {
+      hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
+    } else if (Map) {
+      data.map.set(key, value);
+    } else {
+      assocSet(data.map, key, value);
+    }
+    return this;
+  }
+
+  return mapSet;
+});