January 2022 updates

[WinterMute]

https://github.com/devkitPro/citro2d/re ... tag/v1.6.0

• Added C2D_SetTintMode: switchable tinting modes (solid tint/multiplicative tint/grayscale tint)
• Added C2D_FontSetFilter
• Minor behind-the-scenes performance improvements
• Miscellaneous bugfixes
• Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.

[WinterMute]

https://github.com/devkitPro/gp2x-examp ... tag/v1.2.0

• Allow example building to use parallel jobs

[WinterMute]

https://github.com/devkitPro/3ds-exampl ... /v20220129

• add 3dslink server demo
• Update makefiles for latest libctru changes
• add box2d example (#39)
• add modplug-decoding example (#38)
• integrate interrupt events to unlock camera fps (#37)