rails-api/active_model_serializers — pull request #156 by frodsan (2012-11-20 23:56:01+00:00)
Title: Update travis.yml to use the right Rubinius versions

http://about.travis-ci.org/docs/user/languages/ruby/#Rubinius%3A-1.8-and-1.9-modes%2C-periodic-upgrades