tests run against php 8.3 and 8.4

Author: Tetragramat

.github/workflows/php.yml

@@ -21,6 +21,8 @@ jobs:
           - "8.0"
           - "8.1"
           - "8.2"
+          - "8.3"
+          - "8.4"
         dependencies:
           - "highest"
         include: