ci: tests on PHP 8.4

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

Author: crynobone

.github/workflows/tests.yml

@@ -18,6 +18,7 @@ jobs:
         php:
           - 8.2
           - 8.3
+          - 8.4
         dependencies:
           - "highest"
           - "lowest"