🍏🚑 Fix composer failing on older PHP versions

Author: bramus

.github/workflows/CI.yml

@@ -20,6 +20,7 @@ jobs:
       - uses: shivammathur/setup-php@2.9.0
         with:
           php-version: ${{ matrix.php }}
+          tools: composer:2.2
       - name: Install dependencies
         run: composer update --no-interaction --prefer-dist ${{ matrix.dependencies }}
       - name: Configure PHPUnit problem matchers