updated: Bring back the qlty badge

Author: GianlucaGuarini

README.md

@@ -1,9 +1,7 @@
 # Riot.js webpack-loader
 
 [![Build Status][ci-image]][ci-url]
-
-<!-- [![Issue Count][qlty-image]][qlty-url] -->
-
+[![Issue Count][qlty-image]][qlty-url]
 [![NPM version][npm-version-image]][npm-url]
 [![NPM downloads][npm-downloads-image]][npm-url]
 [![MIT License][license-image]][license-url]
@@ -69,3 +67,5 @@ Please check the following exapmles to see how it's easy to configure webpack wi
 [npm-version-image]: https://img.shields.io/npm/v/@riotjs/webpack-loader.svg?style=flat-square
 [npm-downloads-image]: https://img.shields.io/npm/dm/@riotjs/webpack-loader.svg?style=flat-square
 [npm-url]: https://npmjs.org/package/@riotjs/webpack-loader
+[qlty-image]: https://qlty.sh/gh/riot/projects/webpack-loader/maintainability.svg
+[qlty-url]: https://qlty.sh/gh/riot/projects/webpack-loader