Run tests on PHP 8.4, too

Author: Erdem Köse

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php-version: [8.1, 8.2, 8.3]
+        php-version: [8.1, 8.2, 8.3, 8.4]
         dependency-version: [prefer-lowest, prefer-stable]
 
     name: Tests PHP${{ matrix.php-version }} - ${{ matrix.dependency-version }}