docs(README): add npm, david badges

Author: pine

README.md

@@ -1,7 +1,11 @@
 ArrayBuffer loader for webpack
 ------------------------------
 
+[![npm](https://img.shields.io/npm/v/arraybuffer-loader.svg?maxAge=2592000&style=flat-square)](https://www.npmjs.org/package/arraybuffer-loader)
 [![Travis](https://img.shields.io/travis/pine/arraybuffer-loader/master.svg?maxAge=2592000&style=flat-square)](https://travis-ci.org/pine/arraybuffer-loader)
+[![Dependency Status](https://img.shields.io/david/pine/arraybuffer-loader.svg?maxAge=2592000&style=flat-square)](https://david-dm.org/pine/is-lo)
+[![devDependency Status](https://img.shields.io/david/dev/pine/arraybuffer-loader.svg?maxAge=2592000&style=flat-square)](https://david-dm.org/pine/is-lo#info=devDependencies)
+
 
 ## Getting Started