update travis config with current rubies
update travis config with current rubies

gferguson-gd/sinatra,sinatra/sinatra,Wirachmat/sinatra,trexnix/sinatra,JonMidhir/sinatra,lastcat/sinatra,ryanshaw/sinatra,dariubs/sinatra,jkowens/sinatra,siberianbear/sinatra,porras/sinatra,ganmacs/sinatra,midorineko/sinatra,ktw1222/sinatra,trexnix/sinatra,kumji/sinatra,DoraALin/sinatra,davydovanton/sinatra,DoraALin/sinatra,burningTyger/sinatra,siberianbear/sinatra,QLGu/sinatra,wzheng1/sinatra,ganmacs/sinatra,JonMidhir/sinatra,kyontan/sinatra,mwpastore/sinatra,frechei/sinatra,eileencodes/sinatra,kgrz/sinatra,midorineko/sinatra,d-bot/sinatra,dariubs/sinatra,bmizerany/sinatra,sinatra/sinatra,ryanshaw/sinatra,nicoayala/sinatra,nicoayala/sinatra,d-bot/sinatra,howtolearntocode/sinatra,JonRowe/sinatra,Rayheng/sinatra,wzheng1/sinatra,ksw2599/sinatra,howtolearntocode/sinatra,mwpastore/sinatra,jkowens/sinatra,RosenDimov/sinatra,nju520/sinatra,jenalgit/sinatra,ksw2599/sinatra,cyberid41/sinatra,QLGu/sinatra,ABaldwinHunter/sinatra-classic,ktw1222/sinatra,davydovanton/sinatra,frechei/sinatra,marocchino/sinatra,JonRowe/sinatra,mwpastore/sinatra,guidohcosta/sinatra,Wirachmat/sinatra,ABaldwinHunter/sinatra-classic,autopp/sinatra,blambeau/sinatra,emiliocorpus/sinatra,autopp/sinatra,burningTyger/sinatra,Rayheng/sinatra,gferguson-gd/sinatra,kumji/sinatra,guidohcosta/sinatra,jenalgit/sinatra,jkowens/sinatra,twanies/sinatra,sethuster/sinatra,burningTyger/sinatra,nju520/sinatra,defsprite/sinatra,miyazawatomoka/sinatra,porras/sinatra,laplaceliu/sinatra,miyazawatomoka/sinatra,Callygraphy/morrissey,kyontan/sinatra,defsprite/sinatra,emiliocorpus/sinatra,twanies/sinatra,lastcat/sinatra,laplaceliu/sinatra,cyberid41/sinatra,RosenDimov/sinatra,JonMidhir/sinatra,eileencodes/sinatra,sethuster/sinatra