message: doc(README): Remove Mac OS from Travis CI badge label
  This removes the "mac" from the Travis CI badge label, as we're not
  running Mac OS builds on Travis CI anymore.
  Change-Type: none
diff: @@ -10,7 +10,7 @@ was written correctly and much more.
  [![Current Release](https://img.shields.io/github/release/resin-io/etcher.svg?style=flat-square)](https://etcher.io)
  ![License](https://img.shields.io/github/license/resin-io/etcher.svg?style=flat-square)
  -[![Travis CI status](https://img.shields.io/travis/resin-io/etcher/master.svg?style=flat-square&label=linux%20|%20mac)](https://travis-ci.org/resin-io/etcher/branches)
  +[![Travis CI status](https://img.shields.io/travis/resin-io/etcher/master.svg?style=flat-square&label=linux)](https://travis-ci.org/resin-io/etcher/branches)
  [![AppVeyor status](https://img.shields.io/appveyor/ci/resin-io/etcher/master.svg?style=flat-square&label=windows)](https://ci.appveyor.com/project/resin-io/etcher/branch/master)
  [![Dependency status](https://img.shields.io/david/resin-io/etcher.svg?style=flat-square)](https://david-dm.org/resin-io/etcher)
  [![Resin.io Forums](https://img.shields.io/discourse/https/forums.resin.io/topics.svg?style=flat-square&label=resin.io%20forums)](https://forums.resin.io/c/etcher)
  