Fix missing Laravel 12.*

Author: tonysm

.github/workflows/run-tests.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         php: [8.2, 8.3, 8.4]
-        laravel: [10.*, 11.*]
+        laravel: [10.*, 11.*, 12.*]
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 10.*