Add CircleCI badge [skip ci] (#504)

* Add CircleCI badge [skip ci]

* Change to img.shields.io [skip ci]

README.md

@@ -5,11 +5,12 @@
 </p>
 
 <p align="center">
-  <a href="https://www.npmjs.com/package/babili"><img alt="NPM Version" src="https://img.shields.io/npm/v/babili.svg?style=flat"></a>
-  <a href="https://travis-ci.org/babel/babili"><img alt="Travis Status" src="https://travis-ci.org/babel/babili.svg?branch=master"></a>
-  <a href="https://codecov.io/github/babel/babili"><img alt="Code Coverage" src="https://img.shields.io/codecov/c/github/babel/babili/master.svg?maxAge=43200"></a>
-  <a href="https://slack.babeljs.io/"><img alt="Slack Status" src="https://slack.babeljs.io/badge.svg"></a>
-  <a href="https://www.npmjs.com/package/babel-preset-babili"><img alt="NPM Downloads" src="https://img.shields.io/npm/dm/babel-preset-babili.svg"></a>
+  <a href="https://www.npmjs.com/package/babili"><img alt="NPM Version" src="https://img.shields.io/npm/v/babili.svg?style=flat"/></a>
+  <a href="https://travis-ci.org/babel/babili"><img alt="Travis Status" src="https://img.shields.io/travis/babel/babili/master.svg?label=travis&maxAge=43200"/></a>
+  <a href="https://circleci.com/gh/babel/babili"><img alt="CircleCI Status" src="https://img.shields.io/circleci/project/github/babel/babili/master.svg?label=circle&maxAge=43200"/></a>
+  <a href="https://codecov.io/github/babel/babili"><img alt="Code Coverage" src="https://img.shields.io/codecov/c/github/babel/babili/master.svg?maxAge=43200"/></a>
+  <a href="https://slack.babeljs.io/"><img alt="Slack Status" src="https://slack.babeljs.io/badge.svg"/></a>
+  <a href="https://www.npmjs.com/package/babel-preset-babili"><img alt="NPM Downloads" src="https://img.shields.io/npm/dm/babel-preset-babili.svg"/></a>
 </p>
 
 - Checkout our [CONTRIBUTING.md](/CONTRIBUTING.md) if you want to help out!