Drop Rails 7.0/7.1 and Ruby 3.1 support, add Rails 8.1 support. (#474)

* Drop Rails 7.0/7.1 and Ruby 3.1 support, add Rails 8.1 support
* Exclude Ruby 3.2 from Rails master CI builds

Author: nashby

.github/workflows/ruby.yml

@@ -32,13 +32,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3', '3.4']
+        ruby-version: ['3.2', '3.3', '3.4']
         test: ['minitest', 'rspec']
         gemfile:
-          - Gemfile.rails70
-          - Gemfile.rails71
           - Gemfile.rails72
           - Gemfile.rails80
+          - Gemfile.rails81
           - Gemfile.railsmaster
           - Gemfile.mongo_mapper
         db:
@@ -48,11 +47,7 @@ jobs:
         exclude:
           - gemfile: Gemfile.mongo_mapper
             db: postgresql
-          - ruby-version: '3.1'
-            gemfile: Gemfile.mongo_mapper
-          - ruby-version: '3.1'
-            gemfile: Gemfile.rails80
-          - ruby-version: '3.1'
+          - ruby-version: '3.2'
             gemfile: Gemfile.railsmaster
     env:
       BUNDLE_GEMFILE: "${{ matrix.gemfile }}"

Gemfile.rails70

@@ -1,7 +1,7 @@
 eval_gemfile('Gemfile.global')
 
 gem 'minitest', '~> 5.8'
-gem 'rails',    github: 'rails/rails', branch: '7-1-stable', require: false
+gem 'rails',    github: 'rails/rails', branch: '8-1-stable', require: false
 
 gem 'mongoid',  github: 'mongodb/mongoid'
 

Gemfile.rails71 Gemfile.rails81Gemfile.rails71 renamed to Gemfile.rails81

@@ -22,7 +22,7 @@ Gem::Specification.new do |gem|
     "bug_tracker_uri"   => "https://github.com/brainspec/enumerize/issues",
     "wiki_uri"          => "https://github.com/brainspec/enumerize/wiki"
   }
-  gem.required_ruby_version = '>= 2.7'
+  gem.required_ruby_version = '>= 3.2'
 
   gem.add_dependency('activesupport', '>= 3.2')
 end