style(readme): cleanup bacges

README.md

@@ -1,4 +1,4 @@
-# ts-jest  [![npm version](https://badge.fury.io/js/ts-jest.svg)](https://badge.fury.io/js/ts-jest) [![NPM downloads](https://img.shields.io/npm/dm/ts-jest.svg?style=flat)](https://npmjs.org/package/ts-jest) [![Known Vulnerabilities](https://snyk.io/test/github/kulshekhar/ts-jest/badge.svg)](https://snyk.io/test/github/kulshekhar/ts-jest) [![GitHub issues](https://img.shields.io/github/issues/kulshekhar/ts-jest.svg)](https://github.com/kulshekhar/ts-jest/issues) [![GitHub license](https://img.shields.io/github/license/kulshekhar/ts-jest.svg)](https://github.com/kulshekhar/ts-jest/blob/master/LICENSE) [![Greenkeeper badge](https://badges.greenkeeper.io/kulshekhar/ts-jest.svg)](https://greenkeeper.io/) [![Build Status for linux](https://travis-ci.org/kulshekhar/ts-jest.svg?branch=master)](https://travis-ci.org/kulshekhar/ts-jest) [![Build Status for Windows](https://ci.appveyor.com/api/projects/status/g8tt9qd7usv0tolb/branch/master?svg=true)](https://ci.appveyor.com/project/kulshekhar/ts-jest/branch/master)
+# ts-jest [![npm version](https://badge.fury.io/js/ts-jest.svg)](https://badge.fury.io/js/ts-jest) [![NPM downloads](https://img.shields.io/npm/dm/ts-jest.svg?style=flat)](https://npmjs.org/package/ts-jest) [![Known Vulnerabilities](https://snyk.io/test/github/kulshekhar/ts-jest/badge.svg)](https://snyk.io/test/github/kulshekhar/ts-jest) [![Build Status for linux](https://travis-ci.org/kulshekhar/ts-jest.svg?branch=master)](https://travis-ci.org/kulshekhar/ts-jest) [![Build Status for Windows](https://ci.appveyor.com/api/projects/status/g8tt9qd7usv0tolb/branch/master?svg=true)](https://ci.appveyor.com/project/kulshekhar/ts-jest/branch/master)
 
 <img src="./icon.png" align="right"
      title="TSJest Logo by Huafu Gandon" width="128" height="128">