Update travis badge in README

Author: tsolomko

README.md

@@ -2,7 +2,7 @@
 
 [![Swift 4.2](https://img.shields.io/badge/Swift-4.2-blue.svg)](https://developer.apple.com/swift/)
 [![GitHub license](https://img.shields.io/badge/license-MIT-lightgrey.svg)](https://raw.githubusercontent.com/tsolomko/BitByteData/master/LICENSE)
-[![Build Status](https://travis-ci.org/tsolomko/BitByteData.svg?branch=develop)](https://travis-ci.org/tsolomko/BitByteData)
+[![Build Status](https://travis-ci.com/tsolomko/BitByteData.svg?branch=develop)](https://travis-ci.com/tsolomko/BitByteData)
 
 A Swift framework with classes for reading and writing bits and bytes.