Update CI status badge (#988)

Author: mishina2228

README.md

@@ -8,7 +8,7 @@
 
 :exclamation: Guard is currently accepting more maintainers. Please [read this](https://github.com/guard/guard/wiki/Maintainers) if you're interested in joining the team.
 
-[![Gem Version](https://img.shields.io/gem/v/guard.svg?style=flat)](https://rubygems.org/gems/guard) [![Build Status](https://travis-ci.org/guard/guard.svg?branch=master)](https://travis-ci.org/guard/guard) [![Code Climate](https://codeclimate.com/github/guard/guard/badges/gpa.svg)](https://codeclimate.com/github/guard/guard) [![Test Coverage](https://codeclimate.com/github/guard/guard/badges/coverage.svg)](https://codeclimate.com/github/guard/guard) [![Inline docs](http://inch-ci.org/github/guard/guard.svg)](http://inch-ci.org/github/guard/guard) [![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com)
+[![Gem Version](https://img.shields.io/gem/v/guard.svg?style=flat)](https://rubygems.org/gems/guard) [![Build Status](https://app.travis-ci.com/guard/guard.svg?branch=master)](https://app.travis-ci.com/guard/guard) [![Code Climate](https://codeclimate.com/github/guard/guard/badges/gpa.svg)](https://codeclimate.com/github/guard/guard) [![Test Coverage](https://codeclimate.com/github/guard/guard/badges/coverage.svg)](https://codeclimate.com/github/guard/guard) [![Inline docs](http://inch-ci.org/github/guard/guard.svg)](http://inch-ci.org/github/guard/guard) [![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com)
 
 <img src="http://f.cl.ly/items/0A0M3W2x3I1P450z341U/guard-Icon.png" alt="Guard Icon" align="right" />
 Guard automates various tasks by running custom rules whenever file or directories are modified.