.github/workflows/main.yml in static_collection-0.2.1 vs .github/workflows/main.yml in static_collection-0.3.0

@@ -1,22 +1,43 @@
 ---
 name: Pipeline
 on: push
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     name: Build
     runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        ruby-version: [2.7.5, 3.0.3, 3.1.0]
     steps:
       - uses: actions/checkout@v2
-      - uses: ruby/setup-ruby@v1
+      - name: Set up Ruby ${{ matrix.ruby-version }}
+        uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
+          ruby-version: ${{ matrix.ruby-version }}
       - name: Lint
         run: bundle exec rubocop
       - name: Test
         run: bundle exec rspec
+
+  # Separate `release` job from `build`, as we only want release to be run once
+  # and not run for each ruby version in the matrix:
+  release:
+    name: Release
+    if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
+    needs: build
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
       - name: Release the gem
-        if: ${{ github.ref == 'refs/heads/main' }}
         run: |
           mkdir -p ~/.gem
           cat << EOF > ~/.gem/credentials
           ---
           :github: Bearer ${GITHUB_TOKEN}