Test on PHP 8.4

Author: adrianclay

.github/workflows/php.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: ['ubuntu-latest']
-        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
 
     steps:
     - name: Setup PHP