Limit ruby versions based on the OS X build environment by Travis CI
Limit ruby versions based on the OS X build environment by Travis CI

The OS X Build Environment - Travis CI
http://docs.travis-ci.com/user/osx-ci-environment/

Ruby versions:

- 1.9.3
- 2.0.0(default)
- 2.1.2
- 2.1.3

Tomohiro/airplayer,Tomohiro/airplayer