Material Color Utilities update in Flutter

This release updates package:material_color_utilities from v0.11.1 to 0.13.0. This updated package includes algorithm changes that align with the Material 3 tokens update.

The algorithm changes affect the same properties:

• onPrimaryContainer
• onSecondaryContainer
• onTertiaryContainer
• onErrorContainer

The changes will be reflected when generating a scheme using

• ColorScheme.fromSeed
• ColorScheme.fromImageProvider
• ThemeData(colorScheme:..)

In general, we believe the colors generated will be more legible and visually appealing, but if you want to maintain the previous colors when upgrading you will have to manually set those properties to their desired color after generating.

• Landed in version: 3.39.0-1.0.pre-250
• In stable release: TBD

• Relevant commit: Update material_color_utilities to v0.13.0