I'm trying to get milia up and running on a Rails 6.0.1 app. I am getting the following error:

/.rvm/gems/ruby-2.6.5/gems/milia-0.3.30/app/controllers/registrations_controller.rb:5:in class:RegistrationsController': undefined method skip_before_filter' for Milia::RegistrationsController:Class

I know why the error is occuring, but how can I install milia in a Rails 6.0.1 app?