Update README.md

Author: Bhupesh-V

README.md

@@ -2,6 +2,7 @@
 > [Judge0 API](https://api.judge0.com/) Interface written in Python
 
 ![PyPI](https://img.shields.io/pypi/v/coderunner?color=blue)
+[![Build Status](https://travis-ci.org/codeclassroom/CodeRunner.svg?branch=master)](https://travis-ci.org/codeclassroom/CodeRunner)
 [![GitHub license](https://img.shields.io/github/license/codeclassroom/CodeRunner)](https://github.com/codeclassroom/CodeRunner/blob/master/LICENSE)
 [![GitHub issues](https://img.shields.io/github/issues/codeclassroom/CodeRunner?color=blueviolet)](https://github.com/codeclassroom/CodeRunner/issues)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-orange.svg)](http://makeapullrequest.com)