Villager See, Villager Do

• Added new config "Villagers return selected items" (default false)

  If true, when a villager selects a trade based on an item they were thrown, they'll throw that item back to the player.

• Villagers will now try to select trades for thrown items in the order they were received.
• Villagers will now throw back rejected items sooner.
• Villagers will no longer gather items that they threw, even if they would do so in vanilla.
• Villagers now try even harder to throw items to the most recent player (or other entity) they've interacted with.
• Reworked how persistent data is saved and retrieved
• Fixed villagers not charging an emerald to return gathered items
• Fixed rejecting tipped arrows with potions with modifiers
• Fixed setting suspicious stew trades

A cumulative changelog can be found here