Changes
- Updated unity engine to 2019.3.1f1 - let's hope everything still works
- Loading the game the first time takes longer now, but every other load will be faster
- Added new weather system with visible effects
- Added option to disable weather effects
- Mine grid is now hidden if minimum depth has not been reached
- Mine shards are now reset upon prestige
- Fixed some spelling mistakes
- Fixed infinite town resources
- Fixed passive mine drill always being active