Weaphon smith villagers should sell spears

With the introduction of spears this would be nice to add more villager trades to the weaphon smith for his expert trades which is a guaranted to be a diamond axe and selling a single diamond for a emerald. this can add more to this villager that has very few trades compared to his peers have differnt trade possiblitys. this will also make sense for him to be able to trade spears as he is a weaphon smith who can make weaphons to sell and bring more depth to the weaphon smith.