2/8/2022 balance patch

Pushed a small update to address some balance issues:

-There's now a little more logic to which non-weapon upgrades appear on level up, in particular, health ups are far less common and damage upgrades are far more common. As much fun as it is to be super tanky (and I do still want that to be a viable build) it was too easy to find yourself in the  midgame with no real damage and just be entirely unable to kill trolls / eye balls / dragons.

-Now that I have had a few test plays I can see that every victorious run has included at least 3 of 5 particular weapons. (There's 10 in the game.) This is obviously a problem so the 5 under-performers have had their damage increased significantly.