Add tests for PHP 8.4 (#306)

Co-authored-by: David Greminger <bytehead@users.noreply.github.com>

Author: Chris53897

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: [8.1, 8.2, 8.3]
+                php: [8.1, 8.2, 8.3, 8.4]
                 symfony: [5.4, 6.0, 7.0]
                 exclude:
                   - symfony: 7.0