Add golangci badge

README.md

@@ -3,6 +3,7 @@
 [![CircleCI](https://circleci.com/gh/twirphp/twirp.svg?style=svg)](https://circleci.com/gh/twirphp/twirp)
 [![Twirp Version](http://img.shields.io/badge/twirp%20version-v5.3.0-orange.svg?style=flat-square)](https://github.com/twitchtv/twirp/releases/tag/v5.3.0)
 [![Go Report Card](https://goreportcard.com/badge/github.com/twirphp/twirp?style=flat-square)](https://goreportcard.com/report/github.com/twirphp/twirp)
+[![GolangCI](https://golangci.com/badges/github.com/twirphp/twirp.svg)](https://golangci.com)
 [![GoDoc](http://img.shields.io/badge/godoc-reference-5272B4.svg?style=flat-square)](https://godoc.org/github.com/twirphp/twirp)
 [![Quality Score](https://img.shields.io/scrutinizer/g/twirphp/twirp.svg?style=flat-square)](https://scrutinizer-ci.com/g/twirphp/twirp)
 [![Composer Package](http://img.shields.io/badge/composer-twirp%2Ftwirp-green.svg?style=flat-square)](https://packagist.org/packages/twirp/twirp)