Patch 0.9.2.1

[p][v.458151][/p][p]This patch includes a QOL feature and an important fix for new players.

Also, this update will NOT clear your in-progress runs from Update 4 (Patch 0.9.0) and forward.

• Added difference-highlighting for the Upgrade Screen
  
• Fixed an issue where city characters were not being marked as seen
  

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