Run tests on PHP 8.3 and update test suite

Co-authored-by: clue <776829+clue@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -11,10 +11,9 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-22.04
+          - ubuntu-24.04
           - windows-2022
         php:
-          - 8.4
           - 8.3
           - 8.2
           - 8.1

.gitignore

@@ -1,3 +1,2 @@
 /vendor
 /composer.lock
-/.phpunit.result.cache