Drop EOL Ruby and Rails versions

[Ruby 2.7 and older][] is end of life.

[Rails 6.0 and older][] is end of life.

Truffleruby does have [a documented support cycle][], but since I don't
track this Oracle project I'm not going to maintain it. Use the latest
instead.

I cannot find an up-to-date support cycle roadmap for JRuby, so instead
I've gone with the [9.4 branch][].

Don't support JRuby on Rails main. JRuby has their own bug tracker for
chasing Rails' main branch. We should stick to supporting known releases
in our project.

ActiveRecord JDBC Adapter does not support 7.1 in a release, so don't
support 7.1 yet.

[Ruby 2.7 and older]: https://www.ruby-lang.org/en/downloads/branches/
[Rails 6.0 and older]: https://guides.rubyonrails.org/maintenance_policy.html
[a documented support cycle]: https://www.graalvm.org/release-calendar/
[9.4 branch]: https://www.jruby.org/download

.github/workflows/build.yml

@@ -11,70 +11,21 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - jruby-9.2.16.0
+          - jruby-9.4
           - truffleruby
           - "3.2"
           - "3.1"
           - "3.0"
-          - "2.7"
-          - "2.6"
-          - "2.5"
         rails:
-          - "5.0"
-          - "5.1"
-          - "5.2"
-          - "6.0"
           - "6.1"
           - "7.0"
           - "7.1"
           - main
         exclude:
-          - ruby: 2.5
-            rails: "7.0"
-          - ruby: 2.5
+          - ruby: jruby-9.4
             rails: "7.1"
-          - ruby: 2.5
+          - ruby: jruby-9.4
             rails: main
-          - ruby: 2.6
-            rails: "7.0"
-          - ruby: 2.6
-            rails: "7.1"
-          - ruby: 2.6
-            rails: main
-          - ruby: jruby-9.2.16.0
-            rails: "7.0"
-          - ruby: jruby-9.2.16.0
-            rails: "7.1"
-          - ruby: jruby-9.2.16.0
-            rails: main
-          - ruby: "3.0"
-            rails: "5.0"
-          - ruby: "3.0"
-            rails: "5.1"
-          - ruby: "3.0"
-            rails: "5.2"
-          - ruby: truffleruby
-            rails: "5.0"
-          - ruby: truffleruby
-            rails: "5.1"
-          - ruby: truffleruby
-            rails: "5.2"
-          - ruby: "3.1"
-            rails: "5.0"
-          - ruby: "3.1"
-            rails: "5.1"
-          - ruby: "3.1"
-            rails: "5.2"
-          - ruby: "3.1"
-            rails: "6.0"
-          - ruby: "3.2"
-            rails: "5.0"
-          - ruby: "3.2"
-            rails: "5.1"
-          - ruby: "3.2"
-            rails: "5.2"
-          - ruby: "3.2"
-            rails: "6.0"
 
     runs-on: 'ubuntu-latest'
 

Appraisals

@@ -1,27 +1,3 @@
-appraise "5.0" do
-  gem "activerecord", "~> 5.0.7"
-  gem "activerecord-jdbcsqlite3-adapter", platforms: [:jruby]
-  gem "sqlite3", "~> 1.3.6", platforms: [:ruby]
-end
-
-appraise "5.1" do
-  gem "activerecord", "~> 5.1.7"
-  gem "activerecord-jdbcsqlite3-adapter", platforms: [:jruby]
-  gem "sqlite3", platforms: [:ruby]
-end
-
-appraise "5.2" do
-  gem "activerecord", "~> 5.2.3"
-  gem "activerecord-jdbcsqlite3-adapter", platforms: [:jruby]
-  gem "sqlite3", platforms: [:ruby]
-end
-
-appraise "6.0" do
-  gem "activerecord", "~> 6.0.0"
-  gem "activerecord-jdbcsqlite3-adapter", "~> 60.0", platforms: [:jruby]
-  gem "sqlite3", platforms: [:ruby]
-end
-
 appraise "6.1" do
   gem "activerecord", "~> 6.1.0"
   gem "activerecord-jdbcsqlite3-adapter", "~> 61.0", platforms: [:jruby]
@@ -30,18 +6,20 @@ end
 
 appraise "7.0" do
   gem "activerecord", "~> 7.0.0"
-  gem "activerecord-jdbcsqlite3-adapter", "~> 61.0", platforms: [:jruby]
+  gem "activerecord-jdbcsqlite3-adapter", "~> 70.0", platforms: [:jruby]
   gem "sqlite3", platforms: [:ruby]
 end
 
 appraise "7.1" do
   gem "activerecord", "~> 7.1.0"
-  gem "activerecord-jdbcsqlite3-adapter", "~> 70.0", platforms: [:jruby]
+  # When version 71 is released, uncomment this and also allow it in the GitHub
+  # Action build workflow.
+  # gem "activerecord-jdbcsqlite3-adapter", "~> 71.0", platforms: [:jruby]
   gem "sqlite3", platforms: [:ruby]
 end
 
 appraise "main" do
   gem "activerecord", git: "https://github.com/rails/rails.git", branch: "main"
-  gem "activerecord-jdbcsqlite3-adapter", "~> 61.0", platforms: [:jruby]
+  gem "activerecord-jdbcsqlite3-adapter", "~> 70.0", platforms: [:jruby]
   gem "sqlite3", platforms: [:ruby]
 end