Add badges

Author: titouanmathis

README.md

@@ -1,6 +1,10 @@
 # Prettier formatter for GitLab Code Quality
 
 [![NPM Version](https://img.shields.io/npm/v/@studiometa/prettier-formatter-gitlab.svg?style=flat-square)](https://www.npmjs.com/package/@studiometa/prettier-formatter-gitlab/)
+[![Downloads](https://img.shields.io/npm/dm/@studiometa/prettier-formatter-gitlab?style=flat&colorB=3e63dd&colorA=414853)](https://www.npmjs.com/package/@studiometa/prettier-formatter-gitlab/)
+[![Size](https://img.shields.io/bundlephobia/minzip/@studiometa/prettier-formatter-gitlab?style=flat&colorB=3e63dd&colorA=414853&label=size)](https://bundlephobia.com/package/@studiometa/prettier-formatter-gitlab)
+[![Dependency Status](https://img.shields.io/librariesio/release/npm/@studiometa/prettier-formatter-gitlab?style=flat&colorB=3e63dd&colorA=414853)](https://david-dm.org/studiometa/prettier-formatter-gitlab)
+![Codecov](https://img.shields.io/codecov/c/github/studiometa/prettier-formatter-gitlab?style=flat&colorB=3e63dd&colorA=414853)
 
 > Send Prettier errors to Gitlab's Code Quality reports.