* Fix Rails 6.0 deprecation on `class.parent`
* Update Changelog
* Switch travis to openJDK
* Lock bundler on appveyor
* Rejigger gemfile to fix sqlite issue
* Lock nokogiri for ruby < 2.4
* Use rubygems < 3 to fix travis
* Use specific bundler version and do not try to uninstall
Uninstalling bundler is not allowed since it is a default gem
* Lock rake for ruby < 2.2
* Downgrade rake further to support ruby 1.9.3
* Lock rake down further, and lock simplecov
* Fix rubocop/parser and minitest version deps in CI
* Lock sprockets version
* Try fixing jruby builds
* Try remove bad gem version for jruby on CI
* Try downgrading rubygems a different way
* Do not update rubygems on jruby
* Lock gems for jruby
* Fix sprockets version lock
