- Update constraints to Flutter 2.19.
- Remove not null assert, which is not necessary anymore.
- Minor fixes related to null safety.
- Add null safety.
- Add addHue, addSaturation, addLightness, addHSLuv methods.
- Fix lightness and saturation documentation. It was saying they range from [0, 1] instead of [0, 100].
- Remove additional "(" in toString method from HSLuvColor.
- Initial port of HSLuv with a nice sample app.