docs: Add npm badge

Author: Nargonath

README.md

@@ -9,6 +9,7 @@
 
 [![styled with prettier](https://img.shields.io/badge/styled_with-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 [![Build Status](https://travis-ci.org/dixeed/angularjs-scripts.svg?branch=master)](https://travis-ci.org/dixeed/angularjs-scripts)
+[![npm (scoped)](https://img.shields.io/npm/v/@dixeed/angularjs-scripts.svg)](https://www.npmjs.com/package/@dixeed/angularjs-scripts)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 [![license](https://img.shields.io/github/license/mashape/apistatus.svg)](https://opensource.org/licenses/MIT)