Run Travis tests against more versions of jRuby
Run Travis tests against more versions of jRuby

alexcstark/rubocop,rrosenblum/rubocop,tejasbubane/rubocop,tdeo/rubocop,urbanautomaton/rubocop,meganemura/rubocop,deivid-rodriguez/rubocop,jfelchner/rubocop,panthomakos/rubocop,jmks/rubocop,bquorning/rubocop,petehamilton/rubocop,urbanautomaton/rubocop,jmks/rubocop,tejasbubane/rubocop,rrosenblum/rubocop,sue445/rubocop,alexcstark/rubocop,deivid-rodriguez/rubocop,jmks/rubocop,meganemura/rubocop,maxjacobson/rubocop,smakagon/rubocop,vergenzt/rubocop,panthomakos/rubocop,akihiro17/rubocop,bquorning/rubocop,palkan/rubocop,mikegee/rubocop,pocke/rubocop,palkan/rubocop,vergenzt/rubocop,haziqhafizuddin/rubocop,jfelchner/rubocop,petehamilton/rubocop,scottmatthewman/rubocop,rrosenblum/rubocop,scottmatthewman/rubocop,tdeo/rubocop,bbatsov/rubocop,sue445/rubocop,meganemura/rubocop,mikegee/rubocop,palkan/rubocop,mikegee/rubocop,jfelchner/rubocop,tdeo/rubocop,sue445/rubocop,smakagon/rubocop,akihiro17/rubocop,tejasbubane/rubocop,petehamilton/rubocop,bquorning/rubocop,akihiro17/rubocop,maxjacobson/rubocop,panthomakos/rubocop,haziqhafizuddin/rubocop,maxjacobson/rubocop,bbatsov/rubocop,pocke/rubocop,vergenzt/rubocop,deivid-rodriguez/rubocop