Bump to v4.0.0.

defaultsDeep.js

@@ -0,0 +1,29 @@
+import apply from './internal/apply';
+import mergeDefaults from './internal/mergeDefaults';
+import mergeWith from './mergeWith';
+import rest from './rest';
+
+/**
+ * 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);
+});
+
+export default defaultsDeep;