[CI] Test against rails 6.1

[waghanza]

Hi,

This PR adds rails6 in CI matrix.

As rails6 require ruby >2.5, I've also excluded jruby from rails6 tests.

Regards,

[ivy]

Hey @waghanza - Thanks for updating your PR! 🙌 It looks like you’ve just got a couple of Rubocop violations:

Offenses:

gemfiles/rails_6.1.gemfile:1:1: C: [Correctable] Style/FrozenStringLiteralComment: Missing frozen string literal comment.
source 'https://rubygems.org'
^
gemfiles/rails_6.1.gemfile:8:3: C: [Correctable] Bundler/OrderedGems: Gems should be sorted in an alphabetical order within their section of the Gemfile. Gem actionpack should appear before activerecord.
  gem 'actionpack', '~> 6.1.0'
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
gemfiles/rails_6.1.gemfile:14:3: C: [Correctable] Bundler/OrderedGems: Gems should be sorted in an alphabetical order within their section of the Gemfile. Gem jrjackson should appear before logstash-event.
  gem 'jrjackson', '~> 0.2.9', platforms: :jruby
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

46 files inspected, 3 offenses detected, 3 offenses auto-correctable 

I’ll fix them and get this merged in next time I’m in front of a computer unless you get to it first!

[waghanza]

Done @ivy

Maybe worth using rubocop-rspec also

[iloveitaly]

@waghanza tests are still failing. Want to give it another try? Would love to get this change in.

[waghanza]

@iloveitaly @ivy Not sure what is going on ...

[iloveitaly]

@waghanza still failing, not sure what is going on here.

[waghanza]

Ruby 2.7 / Rails 6 fails and prevent other CI to run

[ytkg]

@waghanza I don't know for what reason it was failing, but #352 has been merged, it may succeed!

[iloveitaly]

@waghanza @ytkg could either of you rebase this branch on master and see if it's passing now?

[waghanza]

@iloveitaly rebased, the CI requires an approval

[waghanza]

@iloveitaly what is the rational behind using this version ?

[iloveitaly]

No idea :) If this needs to change, lets do it.

[ivy]

IIRC (it's been a while), some things changed in the Logstash codebase that removed a class that's depended on in one of Lograge's adapters.