Allow true as a valid value for app.assets.image_optim
Allow true as a valid value for app.assets.image_optim

weheartit/image_optim,ramiroaraujo/image_optim,mihailim/image_optim,ramiroaraujo/image_optim,weheartit/image_optim,toy/image_optim,toy/image_optim,weheartit/image_optim,ramiroaraujo/image_optim,mihailim/image_optim,mihailim/image_optim,toy/image_optim