Test on PHP 8.4

Author: bytestream

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: [8.1, 8.2, 8.3]
+                php: ['8.1', '8.2', '8.3', '8.4']
                 stability: [prefer-stable]
 
         name: PHP ${{ matrix.php }} - ${{ matrix.stability }}