remove jruby 1.8 from travis
remove jruby 1.8 from travis
ramiroaraujo/image_optim,toy/image_optim,toy/image_optim,toy/image_optim,weheartit/image_optim,ramiroaraujo/image_optim,mihailim/image_optim,mihailim/image_optim,ramiroaraujo/image_optim,weheartit/image_optim,weheartit/image_optim,mihailim/image_optim