chore: Update build badge.

README.md

@@ -3,7 +3,7 @@
 [![GitHub License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/cartant/rxjs-tslint-rules/blob/master/LICENSE)
 [![NPM version](https://img.shields.io/npm/v/rxjs-tslint-rules.svg)](https://www.npmjs.com/package/rxjs-tslint-rules)
 [![Downloads](http://img.shields.io/npm/dm/rxjs-tslint-rules.svg)](https://npmjs.org/package/rxjs-tslint-rules)
-[![Build status](https://img.shields.io/travis/cartant/rxjs-tslint-rules.svg)](http://travis-ci.org/cartant/rxjs-tslint-rules)
+[![Build status](https://img.shields.io/circleci/build/github/cartant/rxjs-tslint-rules?token=13476bdceec0da05f324e39e3a902da7983f122a)](https://app.circleci.com/pipelines/github/cartant)
 [![dependency status](https://img.shields.io/david/cartant/rxjs-tslint-rules.svg)](https://david-dm.org/cartant/rxjs-tslint-rules)
 [![devDependency Status](https://img.shields.io/david/dev/cartant/rxjs-tslint-rules.svg)](https://david-dm.org/cartant/rxjs-tslint-rules#info=devDependencies)
 [![peerDependency Status](https://img.shields.io/david/peer/cartant/rxjs-tslint-rules.svg)](https://david-dm.org/cartant/rxjs-tslint-rules#info=peerDependencies)