Change distribution to module project "DKAN"

To be clear this is the project https://www.drupal.org/project/dkan →

This is doable, but I do not see any code to confirm this is now a module. Please go ahead and push the planned code.

https://github.com/GetDKAN/dkan/blob/2.x/composer.json#L3

Please update this issue when the module code is on git.drupalcode.org.