Essential update from original version 1.1.1 - no changes, just a quick fix for an error using 2 groups in a level.

Quick update with an essential feature to help the transition between current trades on your server and trades added by the plugin! You can use this feature to seamlessly integrate the plugin and add new trades without changing any existing villagers (other than level 1 villagers)

Features:
- Added the function 'KeepCurrentTrades' to the config, add any villager types under this section and set them to true in order to stop the plugin changing their current trades on first interaction (only functional if the villager has not been interacted with before this value is set. please test on a none live server to ensure you know how this functions before attempting a live transition)

This feature unfortunately does not work on level 1 villagers, they will have their trade changed to match the config on the first interaction no matter what - ask players to level them up if for some reason they have not and want to keep the trade.

Fixes:
- Fixed lack of product item metadata on cartographer trades where they originaly would have had a filled map
- Fixed a mistake in the base config of 'ENCHANTED_BOOK' under Librarian trade levels 3 and 4 where it should instead be 'ENCHANTED_BOOKS'
- Fixed an error with duplicate trades when only 2 trades were under a level, and error messages when not needed.