PHP 8 Compatibility Changes

Hello,

Two small changes are necessary for the plugin to be compatible with PHP 8.

PHP Deprecated: Required parameter $type follows optional parameter $roles in /bbpress-notify-nospam/includes/controller/common_core.class.php on line 883

PHP Deprecated: Required parameter $type follows optional parameter $roles in /bbpress-notify-nospam/includes/controller/common_core.class.php on line 883

The parameter list just needs to be updated so that there are no required parameters after optional parameters.

Thanks,

Kevin