build: update PHP setup and testing workflow in tests.yml

Author: jackd248

.github/workflows/tests.yml

@@ -25,12 +25,14 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: ${{ matrix.php }}
-          extensions: libxml, simplexml
-          tools: composer:${{ matrix.composer_version }}
+          php-version: ${{ matrix.php-version }}
+          tools: composer:v2
+          coverage: none
 
       - name: Install Composer dependencies
-        run: composer update --no-interaction --no-progress --no-suggest --with=symfony/config:${{ matrix.symfony_constraint }}
+        uses: ramsey/composer-install@v3
+        with:
+          dependency-versions: ${{ matrix.dependencies }}
 
       - name: Run PHPUnit tests
         run: composer test