Unlock Cartographers' New Map by Meeting Wandering Trader

What

Cartographers will unlock new trade, which is map, by meeting wandering traders

Why

There are still lots of sturctures in game that don't have a map, and is very diffcult to find.

It also make wandering traders useful, and encourge players not to lock all their villagers in a small place.

How

A wandering trader will now seek its way to a cartographer, and throw an enchanted empty map to it, the cartographer will pick it up. After that, the cartographer will unlock a new trade that sells a map.

The map will point to one of the following: ancient city, trail ruins, trial chamber, end city.

A wandering trader only has one enchanted empty map.