4.21.16
Fixed visual flash when entering a city
Don't allow removing features for improvements, if it requires an unresearched tech
Decrease time-to-first-pixels for better user experience
AI doesn't accept trades to declare war against multiple civs
Better multiplayer UUID handling - By dangdinhbaohoang12
Correct numeric localization and stat icon suppression - By mvanhorn
Increase luxury diversity - By O-spin