add pull request id to changelog entry about optipng strip option, pr #75
add pull request id to changelog entry about optipng strip option, pr #75
weheartit/image_optim,ramiroaraujo/image_optim,weheartit/image_optim,toy/image_optim,ramiroaraujo/image_optim,toy/image_optim,mihailim/image_optim,toy/image_optim,mihailim/image_optim,mihailim/image_optim,weheartit/image_optim,ramiroaraujo/image_optim