update setup & test workflow

.github/workflows/setup_test.yml

@@ -1,21 +1,28 @@
-name: Setup and test
+name: Setup & test
 
 on: [ push, pull_request ]
 
 jobs:
   tests:
-    name: Composer setup and tests
-    runs-on: ubuntu-latest
+    name: Composer P${{ matrix.php }} - ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        php: [ '8.1', '8.2' ]
     steps:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: ${{ matrix.php }}
+
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+
       - name: Install dependencies
         run: |
           composer install --no-interaction --no-progress --no-suggest
+
       - name: Run tests
         run: |
           composer validate --strict