Laravel 9 Support

[mikkoaf]

There are following dependency issues:

$ composer why-not laravel/framework "^9.0"
mxl/laravel-queue-rate-limit               v3.2.0    requires          illuminate/cache (^7.0||^8.0)
mxl/laravel-queue-rate-limit               v3.2.0    requires          illuminate/contracts (^7.0||^8.0)
mxl/laravel-queue-rate-limit               v3.2.0    requires          illuminate/log (^7.0||^8.0)
mxl/laravel-queue-rate-limit               v3.2.0    requires          illuminate/queue (^7.0||^8.0)