Update .travis.yml
Update .travis.yml

Remove 1.9.2 and ree support.
weedySeaDragon/aruba,AdrieanKhisbe/aruba,e2/aruba,AdrieanKhisbe/aruba,maxmeyer/aruba,e2/aruba,dg-ratiodata/aruba,dg-ratiodata/aruba,jasnow/aruba,mvz/aruba,cucumber/aruba,AdrieanKhisbe/aruba,weedySeaDragon/aruba,rapid7/aruba,jasnow/aruba,maxmeyer/aruba,ducthanh/aruba,jasnow/aruba,dg-ratiodata/aruba,rapid7/aruba,ducthanh/aruba,e2/aruba,dg-ratiodata/aruba,e2/aruba,AdrieanKhisbe/aruba,weedySeaDragon/aruba,ducthanh/aruba,ducthanh/aruba,weedySeaDragon/aruba,mvz/aruba,jasnow/aruba