While hooking into Shopkeepers wasn't necessary (based on how it works, a simple null check would have fixed any problems between my plugin and Shopkeepers plugin), I hooked into Shopkeepers to apply any modifications to any items this plugin modifies normally (Shopkeepers that were created before this plugin was added to the server). I did some testing and everything went nicely, but please post in the Discussion if something is not working ideally or as intended. I hooked into the latest version of Shopkeepers (v1.83). Using any version lower than this might cause problems.

Removed the download update option from the updater (checking for update still exists).

Removed the option to disable villager interaction as it was provided to help with the Shopkeepers bug which is now fixed.