Simplify the testing matrix and only test on Ruby 3.4

Author: davidcelis

.github/workflows/ci.yml

@@ -2,21 +2,18 @@ name: CI
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
-    branches: [ master ]
+    branches: [master]
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        # Test against multiple Ruby versions and pagination libraries
-        # Note: Ruby 3.2/3.3 have 1 pre-existing test failure in Kaminari/WillPaginate
-        # (Fixnum monkey-patching in spec/rails_spec.rb:273)
-        ruby: ['3.1', '3.2', '3.3']
-        paginator: ['pagy', 'kaminari', 'will_paginate']
+        # Test against pagination libraries
+        paginator: ["pagy", "kaminari", "will_paginate"]
     env:
       PAGINATOR: ${{ matrix.paginator }}
     steps:
@@ -25,7 +22,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: ${{ matrix.ruby }}
+          ruby-version: 3.4
           bundler-cache: true
 
       - name: Run tests