Update README.md

Author: krazyjakee

README.md

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 jQuery.Keyframes
 ===========
 
-![https://www.npmjs.com/package/jquerykeyframes](https://badge.fury.io/js/jquerykeyframes.svg)
+[![npm version](https://img.shields.io/npm/v/jquerykeyframes.svg?style=flat-square)](https://www.npmjs.org/package/jquerykeyframes)
 
 This library is a wrapper around [Keyframes.js](https://github.com/Keyframes/Keyframes), a vanilla js library that allows dynamic generation of CSS keyframes with callback events and other niceness.