Fix Travis Build status (ThaDafinser#112)

Author: photodude

README.md

@@ -1,6 +1,6 @@
 # UserAgentParser
 
-[![Build Status](https://travis-ci.org/ThaDafinser/UserAgentParser.svg)](https://travis-ci.org/ThaDafinser/UserAgentParser)
+[![Build Status](https://travis-ci.org/ThaDafinser/UserAgentParser.svg?branch=master)](https://travis-ci.org/ThaDafinser/UserAgentParser)
 [![Code Coverage](https://scrutinizer-ci.com/g/ThaDafinser/UserAgentParser/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/ThaDafinser/UserAgentParser/?branch=master)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/ThaDafinser/UserAgentParser/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/ThaDafinser/UserAgentParser/?branch=master)