Upgrade to flutter 3.0.0

[rulim34]

When will the flutter 3.0.0 support merged and released to pub.dev?

[rydmike]

Hi thanks for the question, it has been a bit slow progress, I simply had to do work on paid work :D
but it is progressing steadily now, some more info here:

#52 (comment)

[rydmike]

Closing, this is done via #58 and in latest release v5.1.0 https://pub.dev/packages/flex_color_scheme/changelog.