Drop support for older rails versions

Author: andrehjr

.github/workflows/ci.yml

@@ -6,43 +6,34 @@ jobs:
   test:
     strategy:
       matrix:
-        include:
-          - gemfile: 6.0.gemfile
-            ruby: 2.5
-
-          - gemfile: 6.0.gemfile
-            ruby: 2.6
-
-          - gemfile: 6.0.gemfile
-            ruby: 2.7
-
-          - gemfile: 6.0.gemfile
-            ruby: '3.0'
-
-          - gemfile: 6.1.gemfile
-            ruby: '3.0'
-
-          - gemfile: 7.0.gemfile
-            ruby: '3.0'
-
-          - gemfile: 7.0.gemfile
-            ruby: '3.1'
-
-          - gemfile: 7.0.gemfile
-            ruby: '3.2'
-
+        ruby: ["3.4", "3.3", "3.2", "3.1", "3.0", "2.7"]
+        rails: ["8.0", "7.2", "7.1", "6.1"]
+        exclude:
+          - rails: "7.2"
+            ruby: "2.7"
+          - rails: "7.2"
+            ruby: "3.0"
+
+          - rails: "8.0"
+            ruby: "2.7"
+          - rails: "8.0"
+            ruby: "3.0"
+          - rails: "8.0"
+            ruby: "3.1"
     runs-on: ubuntu-latest
 
     services:
       redis:
         image: redis
-        ports: ['6379:6379']
+        ports: ["6379:6379"]
         options: >-
           --health-cmd "redis-cli ping"
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
 
+    env:
+      RAILS_VERSION: ${{ matrix.rails }}
     steps:
       - uses: actions/checkout@v4
 
@@ -52,7 +43,6 @@ jobs:
 
       - name: Install dependencies
         run: |
-          bundle config set gemfile "${GITHUB_WORKSPACE}/gemfiles/${{ matrix.gemfile }}"
           bundle install --jobs 4 --retry 3
 
       - name: Display Ruby version

Gemfile

@@ -6,4 +6,6 @@ gemspec
 
 gem "rubocop", require: false
 gem "codeclimate-test-reporter"
-gem "rack", "< 3"
+gem "concurrent-ruby", "< 1.3.5"
+
+gem "rails", "~> #{ENV.fetch('RAILS_VERSION', '8.0')}"