[WIP] Upgrade to Rails 6.0.1

[JessRudder]

We're upgrading to Rails 6.0.1! 🎉

Here's what needs to be done:

• [ ] Check changelogs for upgraded gems for any gotchas:
  • [ ] rails-i18n
  • [ ] sass-rails
  • [ ] sprockets (correct the quotes used here)
  • [x] action-cable-testing
• [ ] Make decision on encrpyted cookies
  • 6.0.1 has new encrypted cookies that are more secure but if we use them, all the 5.2.X cookies will be invalidated as soon as we upgrade
• [ ] Check that npm packages are correctly moved into the rails scope where necessary
• TBD

[renz45]

That ParameterFilter error is coming from rspec I believe, if you upgrade to gem 'rspec-rails', '>= 4.0.0.beta3' it should solve the issue.

I also didn't see any issues with sass/sprockets so far either 😄