improve dungeon rewards/drops

currently the normal dungeon keys do not provide that great of a reward. some of the weapons/tools aren't very useful (a pickaxe with sharpness?). the uncommon armor has almost no protection and has lowered durability due to thorns. the rare armor is good but since it has so many low level enchants it is unlikely users will be able to add mending to it. when it comes to the legendary crate the only issue is that all of the armor and some of the weapons are to high level making it impossible for users to add mending. this means that any user that manages to actually finish the dungeon and get the legendary key will have this armor or weapons eventually break. this is only exaggerated more so by the thorns on the armor that will make it break even faster.