Merge pull request #34 from ray-di/php8.4

Enable PHP 8.4 compat

Author: koriym

.github/workflows/continuous-integration.yml

@@ -9,6 +9,6 @@ jobs:
   ci:
     uses: ray-di/.github/.github/workflows/continuous-integration.yml@v1
     with:
-      old_stable: '["7.3", "7.4", "8.0", "8.1", "8.2"]'
-      current_stable: 8.3
+      old_stable: '["7.3", "7.4", "8.0", "8.1", "8.2", , "8.31"]'
+      current_stable: 8.4
       script: demo/run.php