Add a matrix for testing

.github/workflows/php.yml

@@ -8,6 +8,9 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        php: ['7.4', '8.0', '8.1']
     runs-on: ubuntu-latest
 
     steps:
@@ -16,7 +19,7 @@ jobs:
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: '7.4'
+        php-version: ${{ matrix.php }}
 
     - name: Cache Composer packages
       id: composer-cache
@@ -27,11 +30,14 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-php-
 
+    - name: Remove pint if not PHP 8.1
+      run: |
+        if [ ${{ matrix.php }} != '8.1' ]; then
+          composer remove laravel/pint --dev
+        fi
+
     - name: Install dependencies
       run: composer install --prefer-dist --no-progress
 
-    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
-    # Docs: https://getcomposer.org/doc/articles/scripts.md
-
     - name: Run test suite
       run: composer run test