revert laravel 8 support

Author: veneliniliev

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
     strategy:
       matrix:
         php-version: ['8.0', '8.1']
-        laravel-version: ['^8.83', '^9']
+        laravel-version: ['^8', '^9']
     steps:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2