Pin `gems` to `~> 0.8.3`
Pin `gems` to `~> 0.8.3`

1.0.0 and up requires Ruby 2.1.9+.
https://rubygems.org/gems/gems/versions/1.0.0

travis-ci/dpl,pengsrc/dpl,testfairy/dpl,testfairy/dpl,travis-ci/dpl,testfairy/dpl,computology/dpl,travis-ci/dpl