⬆️ upgrade Unidragger v2.1; use ev-emitter; v2.1.0

👕 remove .jshintrc
🍹 gulp version use \d+
📦 remove bower.json version

Author: desandro

.jshintrc

@@ -24,9 +24,9 @@ Install with [Bower](http://bower.io): `bower install draggabilly`
 Link directly to Draggabilly files on [npmcdn.com](https://npmcdn.com).
 
 ``` html
-<script src="https://npmcdn.com/draggabilly@2.0.1/dist/draggabilly.pkgd.min.js"></script>
+<script src="https://npmcdn.com/draggabilly@2.1/dist/draggabilly.pkgd.min.js"></script>
 <!-- or -->
-<script src="https://npmcdn.com/draggabilly@2.0.1/dist/draggabilly.pkgd.js"></script>
+<script src="https://npmcdn.com/draggabilly@2.1/dist/draggabilly.pkgd.js"></script>
 ```
 
 ## Usage

README.md

@@ -1,11 +1,10 @@
 {
   "name": "draggabilly",
   "main": "draggabilly.js",
-  "version": "2.0.1",
   "description": "make that shiz draggable",
   "dependencies": {
     "get-size": "~2.0.2",
-    "unidragger": "~2.0.0"
+    "unidragger": "~2.1.0"
   },
   "devDependencies": {
     "qunit": "~1.20",