Stop running tests on Ruby 2.4
GitLab switched to Ruby 2.5 in version 11.6. Considering GitLab 11.8 is out, I think we can drop Ruby 2.4 from our CI matrix now.
GitLab switched to Ruby 2.5 in version 11.6. Considering GitLab 11.8 is out, I think we can drop Ruby 2.4 from our CI matrix now.