removed ruby 2.1 from travis
removed ruby 2.1 from travis

d2bit/timeoverflow,d2bit/timeoverflow,coopdevs/timeoverflow,d2bit/timeoverflow,jordipujollarena/timeoverflow,coopdevs/timeoverflow,coopdevs/timeoverflow,jordipujollarena/timeoverflow,d2bit/timeoverflow,jordipujollarena/timeoverflow,coopdevs/timeoverflow