docs(readme): change branch master to ci badges

Author: Scrum

readme.md

@@ -162,10 +162,10 @@ $ posthtml -i inputFolder/*.html -r
 [testen-image]: https://img.shields.io/badge/testen-passing-brightgreen.svg?style=flat-square
 
 [travis-url]: https://travis-ci.org/posthtml/posthtml-cli
-[travis-image]: http://img.shields.io/travis/posthtml/posthtml-cli.svg?style=flat-square&label=unix
+[travis-image]: http://img.shields.io/travis/posthtml/posthtml-cli/master.svg?style=flat-square&label=unix
 
 [appveyor]:     https://ci.appveyor.com/project/GitScrum/posthtml-cli
-[appveyor-img]: https://img.shields.io/appveyor/ci/GitScrum/posthtml-cli.svg?style=flat-square&label=windows
+[appveyor-img]: https://img.shields.io/appveyor/ci/GitScrum/posthtml-cli/master.svg?style=flat-square&label=windows
 
 [coveralls-url]: https://coveralls.io/r/posthtml/posthtml-cli
 [coveralls-image]: http://img.shields.io/coveralls/posthtml/posthtml-cli.svg?style=flat-square