CI: Add Ruby 4.0 and Rails 8.1 to CI Matrix

Fix a load error for the benchmark gem on Rails 6.1 with Ruby 4.0
Remove Ruby 3.2 from CI Matrix following rails-dev (Rails 8.2) support drop
Bump actions/checkout from 4 to 6

Author: taketo1113

.github/workflows/ci.yml

@@ -10,10 +10,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
-        gemfile: [rails_5.2.gemfile, rails_6.1.gemfile, rails_7.0.gemfile, rails_7.1.gemfile, rails_7.2.gemfile, rails_8.0.gemfile, rails_dev.gemfile]
+        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '4.0']
+        gemfile: [rails_5.2.gemfile, rails_6.1.gemfile, rails_7.0.gemfile, rails_7.1.gemfile, rails_7.2.gemfile, rails_8.0.gemfile, rails_8.1.gemfile, rails_dev.gemfile]
         exclude:
-          # Ruby 3.2 is min version for Rails 8
+          # Ruby 3.3 is min version for Rails 8.2
           - ruby: '2.5'
             gemfile: rails_dev.gemfile
           - ruby: '2.6'
@@ -24,6 +24,19 @@ jobs:
             gemfile: rails_dev.gemfile
           - ruby: '3.1'
             gemfile: rails_dev.gemfile
+          - ruby: '3.2'
+            gemfile: rails_dev.gemfile
+          # Ruby 3.2 is min version for Rails 8.1
+          - ruby: '2.5'
+            gemfile: rails_8.1.gemfile
+          - ruby: '2.6'
+            gemfile: rails_8.1.gemfile
+          - ruby: '2.7'
+            gemfile: rails_8.1.gemfile
+          - ruby: '3.0'
+            gemfile: rails_8.1.gemfile
+          - ruby: '3.1'
+            gemfile: rails_8.1.gemfile
           # Ruby 3.2 is min version for Rails 8.0
           - ruby: '2.5'
             gemfile: rails_8.0.gemfile
@@ -65,11 +78,13 @@ jobs:
             gemfile: rails_5.2.gemfile
           - ruby: '3.4'
             gemfile: rails_5.2.gemfile
+          - ruby: '4.0'
+            gemfile: rails_5.2.gemfile
     runs-on: ubuntu-latest
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}

Appraisals

@@ -5,33 +5,33 @@ end
 
 appraise 'rails-6.1' do
   gem 'rails', '~> 6.1.0'
-  gem 'activeresource', '~> 5.1.0'
   gem 'bigdecimal'
   gem 'mutex_m'
+  gem 'benchmark'
   gem 'concurrent-ruby', '1.3.4'
 end
 
 appraise 'rails-7.0' do
   gem 'rails', '~> 7.0.0'
-  gem 'activeresource', '~> 6.0.0'
   gem 'bigdecimal'
   gem 'mutex_m'
   gem 'concurrent-ruby', '1.3.4'
 end
 
 appraise 'rails-7.1' do
   gem 'rails', '~> 7.1.0'
-  gem 'activeresource', '~> 6.0.0'
 end
 
 appraise 'rails-7.2' do
   gem 'rails', '~> 7.2.0'
-  gem 'activeresource', '~> 6.0.0'
 end
 
 appraise 'rails-8.0' do
   gem 'rails', '~> 8.0.0'
-  gem 'activeresource', '~> 6.0.0'
+end
+
+appraise 'rails-8.1' do
+  gem 'rails', '~> 8.1.0'
 end
 
 appraise 'rails-dev' do

gemfiles/rails_6.1.gemfile

@@ -3,9 +3,9 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 6.1.0"
-gem "activeresource", "~> 5.1.0"
 gem "bigdecimal"
 gem "mutex_m"
+gem "benchmark"
 gem "concurrent-ruby", "1.3.4"
 
 gemspec path: "../"

gemfiles/rails_7.0.gemfile

@@ -3,7 +3,6 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 7.0.0"
-gem "activeresource", "~> 6.0.0"
 gem "bigdecimal"
 gem "mutex_m"
 gem "concurrent-ruby", "1.3.4"

gemfiles/rails_7.1.gemfile

@@ -3,6 +3,5 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 7.1.0"
-gem "activeresource", "~> 6.0.0"
 
 gemspec path: "../"

gemfiles/rails_7.2.gemfile

@@ -3,6 +3,5 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 7.2.0"
-gem "activeresource", "~> 6.0.0"
 
 gemspec path: "../"

gemfiles/rails_8.0.gemfile

@@ -3,6 +3,5 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 8.0.0"
-gem "activeresource", "~> 6.0.0"
 
 gemspec path: "../"

gemfiles/rails_8.1.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 8.1.0"
+
+gemspec path: "../"