Update travis badge in README

README.md

@@ -4,7 +4,7 @@ additional date-time classes that complement those in js-joda
 [![Greenkeeper badge](https://badges.greenkeeper.io/js-joda/js-joda-locale.svg)](https://greenkeeper.io/)
 
 [![npm version](https://badge.fury.io/js/js-joda-locale.svg)](https://badge.fury.io/js/js-joda-locale)
-[![Build Status](https://travis-ci.org/js-joda/js-joda-locale.svg)](https://travis-ci.org/js-joda/js-joda-locale)
+[![Build Status](https://travis-ci.org/js-joda/js-joda-locale.svg?branch=master)](https://travis-ci.org/js-joda/js-joda-locale)
 ![Sauce Test Status](https://saucelabs.com/buildstatus/js-joda-locale)
 [![Coverage Status](https://coveralls.io/repos/js-joda/js-joda-locale/badge.svg?branch=master&service=github)](https://coveralls.io/github/js-joda/js-joda-locale?branch=master)
 [![Tested node version](https://img.shields.io/badge/tested_with-current_node_LTS-blue.svg?style=flat)]()