Test against PHP 8.3 + 8.4

Author: W0rma

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [8.0, 8.1, 8.2]
+        php: [8.0, 8.1, 8.2, 8.3, 8.4]
 
     steps:
     - name: Checkout code