Upgraded to libGDX 1.11.0 - enables Unciv on M1 chips

Allow Android Unciv more memory than standard apps - By Azzurite

Allow liberating a traded city - By JackRainy

By xlenstra:
- Disabled CS buttons when at war; CS keep influence when at war with ally 
- Fixed bug where roads could not be removed 

By SomeTroglodyte:
- Accelerate custom map selection
- Map Editor improvements 
- Notifications no longer become unscrollable past a point

Capital movement tweaks  - By OptimizedForDensity