Patch 3.2.0: More gold in cave map and nerfed many enemy units

Patch 3.2.0: - You now gain about 20% more gold on average from units and spells in the cave challenge (reduced variance by raising the minimum gold that you can get). - Nerfed the following enemies in cave (less will spawn of them on average): Shard Souls, Brutes, Dwarf Warriors, Centaurs, Fish Priests, Ogres, Golems, Pyromancers, Frost Giants, Griffins, Elder Dragon, Forest Dragon. - Rogue Rats are now added to the pool of enemies from round 10, instead of being possible to get from round 1.