Bump to v4.2.0.

defer.js

@@ -15,7 +15,7 @@ define(['./_baseDelay', './rest'], function(baseDelay, rest) {
    * _.defer(function(text) {
    *   console.log(text);
    * }, 'deferred');
-   * // logs 'deferred' after one or more milliseconds
+   * // => logs 'deferred' after one or more milliseconds
    */
   var defer = rest(function(func, args) {
     return baseDelay(func, 1, args);