Update README.md

Author: bhubbard

README.md

@@ -7,5 +7,6 @@ Based off of the [PHP Wrapper Class](https://github.com/watchfulli/uptimeRobot)
 [![Code Climate](https://codeclimate.com/repos/57ca13164a9f206d610010d9/badges/820d26e3762b0de078b3/gpa.svg)](https://codeclimate.com/repos/57ca13164a9f206d610010d9/feed)
 [![Test Coverage](https://codeclimate.com/repos/57ca13164a9f206d610010d9/badges/820d26e3762b0de078b3/coverage.svg)](https://codeclimate.com/repos/57ca13164a9f206d610010d9/coverage)
 [![Issue Count](https://codeclimate.com/repos/57ca13164a9f206d610010d9/badges/820d26e3762b0de078b3/issue_count.svg)](https://codeclimate.com/repos/57ca13164a9f206d610010d9/feed)
+[![Build Status](https://travis-ci.org/wp-api-libraries/wp-uptime-robot-api.svg?branch=master)](https://travis-ci.org/wp-api-libraries/wp-uptime-robot-api)
 
 [API Documentation](https://uptimerobot.com/api)