Bump to v4.0.0.

defaultsDeep.js

@@ -0,0 +1,30 @@
+define(['./internal/apply', './internal/mergeDefaults', './mergeWith', './rest'], function(apply, mergeDefaults, mergeWith, rest) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * This method is like `_.defaults` except that it recursively assigns
+   * default properties.
+   *
+   * **Note:** This method mutates `object`.
+   *
+   * @static
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The destination object.
+   * @param {...Object} [sources] The source objects.
+   * @returns {Object} Returns `object`.
+   * @example
+   *
+   * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
+   * // => { 'user': { 'name': 'barney', 'age': 36 } }
+   *
+   */
+  var defaultsDeep = rest(function(args) {
+    args.push(undefined, mergeDefaults);
+    return apply(mergeWith, undefined, args);
+  });
+
+  return defaultsDeep;
+});