Commands don't respect additional paths

[dkniffin]

I have additional importmap files configured via:

Rails.application.configure do
  config.importmap.paths << Rails.root.join("config/importmap-packages-lock.rb")
end

When I run bin/importmap outdated (for example), it doesn't list the packages in that additional file, only the ones in config/importmap.rb. I think that's because this line doesn't configure any paths, and the default only includes config/importmap.rb