[8.x] Use stdClass as placeholder (#36996)
[8.x] Use stdClass as placeholder (#36996)

* Use stdClass as placeholder

* Update Validator.php

Co-authored-by: Taylor Otwell <5d74ae093a16a00e5af127763f2dc7e13988f162@laravel.com>
driesvints/framework,lucasmichot/framework,mul14/laravel-framework,samlev/framework,arturock/framework,bytestream/framework,mul14/laravel-framework,lucasmichot/framework,morrislaptop/framework,notebowl/laravel-framework,JamesForks/framework,arturock/framework,tomschlick/framework,leo108/laravel_framework,dwightwatson/framework,samlev/framework,JamesForks/framework,mul14/laravel-framework,driesvints/framework,stevebauman/framework,laravel/framework,hafezdivandari/framework,laravel/framework,morrislaptop/framework,bytestream/framework,notebowl/laravel-framework,arturock/framework,dwightwatson/framework,stevebauman/framework,tomschlick/framework,hafezdivandari/framework,mul14/laravel-framework,leo108/laravel_framework,crynobone/framework,crynobone/framework,tomschlick/framework