Update gems
Update gems

Diffs:

https://diff.coditsu.io/gems/jquery-rails/4.3.5/4.4.0
https://diff.coditsu.io/gems/mimemagic/0.3.4/0.3.5
https://diff.coditsu.io/gems/public_suffix/4.0.4/4.0.5
https://diff.coditsu.io/gems/rspec-expectations/3.9.1/3.9.2
https://diff.coditsu.io/gems/slim/4.0.1/4.1.0

barsoom/pipeline,barsoom/pipeline,barsoom/pipeline,barsoom/pipeline