Test with PHP 8.4

Author: kassner

.github/workflows/codebase.yaml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ["8.3", "8.2", "8.1", "8.0", "7.4"]
+        php: ["8.4", "8.3", "8.2", "8.1", "8.0", "7.4"]
 
     name: PHP ${{ matrix.php }}