Update Ruby versions in travis
Update Ruby versions in travis

dLobatog/dynflow,daviddavis/dynflow,dLobatog/dynflow,adamruzicka/dynflow,daviddavis/dynflow,adamruzicka/dynflow,daviddavis/dynflow,Dynflow/dynflow,Dynflow/dynflow,adamruzicka/dynflow,Dynflow/dynflow,Dynflow/dynflow,adamruzicka/dynflow,daviddavis/dynflow,dLobatog/dynflow,dLobatog/dynflow