This commit gets the Travis build passing by:
- Removing Rails 4.2 so we don't have to deal with bundler < 2 anymore
- Bumping to latest Rails versions
- Explicitly listing all gems that appear in the default Rails Gemfile
- Avoiding bootsnap and javascript, since they aren't relevant to these tests
Co-authored-by: alex <alexandr1golubenko@gmail.com>
Rails 6.0.0 generates a Gemfile with sass-rails at `~> 5`. Our
Appraisals need to match, or else we end up installing version 6 on CI
and the tests fail with the wrong version.