Drop support for End of Life Ruby and Rails versions (#570)

- Ruby 2.7 is EOL
- Rails 5.x and 6.0 are EOL
- Rails 6.1 active support is over, and security support ends in 4 weeks

https://endoflife.date/rails

Author: jeromedalbert

.github/workflows/ruby.yml

@@ -15,64 +15,21 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - "2.7"
           - "3.0"
           - "3.1"
           - "3.2"
           - "3.3"
 
         gemfile:
-          - "rails_6_1"
           - "rails_7_0"
           - "rails_7_1"
           - "rails_head"
 
         exclude:
-          - ruby: 2.7
-            gemfile: rails_head
           - ruby: '3.0'
             gemfile: rails_head
 
         include:
-          - ruby: 2.2
-            gemfile: rails_5_0
-          - ruby: 2.2
-            gemfile: rails_5_1
-          - ruby: 2.3
-            gemfile: rails_5_0
-          - ruby: 2.3
-            gemfile: rails_5_1
-          - ruby: 2.3
-            gemfile: rails_5_2
-          - ruby: 2.4
-            gemfile: rails_5_0
-          - ruby: 2.4
-            gemfile: rails_5_1
-          - ruby: 2.4
-            gemfile: rails_5_2
-          - ruby: 2.5
-            gemfile: rails_5_0
-          - ruby: 2.5
-            gemfile: rails_5_1
-          - ruby: 2.5
-            gemfile: rails_5_2
-          - ruby: 2.5
-            gemfile: rails_6_0
-          - ruby: 2.5
-            gemfile: rails_6_1
-          - ruby: 2.6
-            gemfile: rails_5_0
-          - ruby: 2.6
-            gemfile: rails_5_1
-          - ruby: 2.6
-            gemfile: rails_5_2
-          - ruby: 2.6
-            gemfile: rails_6_0
-          - ruby: 2.6
-            gemfile: rails_6_1
-          - ruby: 2.7
-            gemfile: rails_6_0
-
           - ruby: '3.1'
             gemfile: rails_head
           - ruby: '3.2'

Appraisals

@@ -1,30 +1,3 @@
-if RUBY_VERSION < "2.7.0"
-  appraise "rails-5-0" do
-    gem "rails", "~> 5.0.0"
-    gem "loofah", "< 2.21.0"
-  end
-
-  appraise "rails-5-1" do
-    gem "rails", "~> 5.1.0"
-    gem "loofah", "< 2.21.0"
-  end
-
-  appraise "rails-5-2" do
-    gem "rails", "~> 5.2.0"
-    gem "loofah", "< 2.21.0"
-  end
-end
-
-if RUBY_VERSION >= "2.5.0"
-  appraise "rails-6-0" do
-    gem "rails", "~> 6.0.0"
-  end
-
-  appraise "rails-6-1" do
-    gem "rails", "~> 6.1.0"
-  end
-end
-
 if RUBY_VERSION >= "2.7.0"
   appraise "rails-7-0" do
     gem "rails", "~> 7.0.0"