ci: remove travis badge

Author: phaux

README.md

@@ -1,8 +1,7 @@
 # FFmpeg-Stream
 
-[![Travis](https://img.shields.io/travis/phaux/node-ffmpeg-stream)](https://travis-ci.org/phaux/node-ffmpeg-stream)
-[![Codecov](https://img.shields.io/codecov/c/gh/phaux/node-ffmpeg-stream)](https://codecov.io/gh/phaux/node-ffmpeg-stream)
 [![npm](https://img.shields.io/npm/v/ffmpeg-stream)](https://www.npmjs.com/package/ffmpeg-stream)
+[![Codecov](https://img.shields.io/codecov/c/gh/phaux/node-ffmpeg-stream)](https://app.codecov.io/gh/phaux/node-ffmpeg-stream)
 
 Node bindings to ffmpeg command, exposing stream based API.