deprecated circleci/ruby does not have an image for 3.1
new cimg/ruby does not have images for 2.2 or 2.3
2.4 2.5 and 2.6 images from cimg/ruby have a default bundler gem (not the case in deprecated images), and we need a specific (different) version of bundler to test against rails 4.1 and 4.2
Short description of the changes
split test in 2: test newer versions (2.7+) with new images and test-older-versions with deprecated images
Which problem is this PR solving?
circleci/ruby
does not have an image for 3.1cimg/ruby
does not have images for 2.2 or 2.3cimg/ruby
have a default bundler gem (not the case in deprecated images), and we need a specific (different) version of bundler to test against rails 4.1 and 4.2Short description of the changes