Try testing against every Ruby version since 2.5

.github/workflows/main.yml

@@ -3,11 +3,13 @@ name: Test
 on: [push, pull_request]
 
 jobs:
+  ruby-versions:
+    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
+    with:
+      min_version: 2.5
+
   test:
-    strategy:
-      fail-fast: false
-      matrix:
-        ruby-version: [3.2, 3.1, '3.0', 2.7, 2.6, 2.5]
+    needs: ruby-versions
 
     # From https://docs.github.com/en/actions/guides/creating-redis-service-containers
     services:
@@ -21,15 +23,26 @@ jobs:
         ports:
           - 6379:6379
 
-    runs-on: ubuntu-latest
+    name: Test (${{ matrix.ruby }} / ${{ matrix.os }})
+    strategy:
+      matrix:
+        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        # exclude:
+        #   - { ruby: jruby }
+        #   - { ruby: jruby-head }
+        #   - { ruby: truffleruby }
+        #   - { ruby: truffleruby-head }
+
+    runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
-    - name: Set up Ruby ${{ matrix.ruby-version }}
+    - name: Set up Ruby ${{ matrix.ruby }}
       uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
-        ruby-version: ${{ matrix.ruby-version }}
+        ruby-version: ${{ matrix.ruby }}
 
     - name: Run tests & lint
       run: bundle exec rake