Update .travis.yml
Update .travis.yml

Changed to just run the tests against stable.
jakemac53/stagehand,mswift42/stagehand,jakemac53/stagehand,ronlobo/stagehand,jakemac53/stagehand,kasperpeulen/stagehand,ronlobo/stagehand,chalin/stagehand,mswift42/stagehand,dart-archive/stagehand,kasperpeulen/stagehand,mswift42/stagehand,dart-archive/stagehand,chalin/stagehand,chalin/stagehand,Kleak/stagehand,Kleak/stagehand,dart-archive/stagehand,kasperpeulen/stagehand,ronlobo/stagehand,Kleak/stagehand