Beta Update 20211112

A few small balance and modding changes to the beta:

Modding: Game now checks that all elements of the spell list are actually spells before launch (ah typ)

A few balance changes: Mercurize Initial max charges 8->6

Lightnign Spire Now the arcs hit cells adjacent to the targets as well as along the beam (hopefully less awkward to actually deal damage with this now)

Other balance: Gold Drake Dragon Mage upgrade cost 6->4 cooldown 15->8