This release fixes the issue where the description of the item would not appear in the menu (the lore would be empty for some items).
This release also updates the en_us.json file to add an additional string warning.sell.filled_container, and color change to message.listing.purchased.value.
The config.yml file has been updated to add a preventFilledContainers: true/false setting to disable the ability to sell shulkerboxes with items.
This version still does not fully implement tab-completion and another release will be forthcoming with those changes.
As always, backup your data before deploying to your servers. This is still a release candidate and may still have issues.