Run pathological tests on PHP 8.4

Author: colinodell

.github/workflows/tests.yml

@@ -118,7 +118,7 @@ jobs:
 
             - uses: shivammathur/setup-php@v2
               with:
-                  php-version: 8.1
+                  php-version: 8.4
                   extensions: curl, mbstring, yaml
                   coverage: none
                   tools: composer:v2