Null safety support

[lig]

I'm going to submit a PR for the null safety support.

It is a common practice to keep such a code in a separate branch, i.e. null-safety, to be able to support the main release in legacy mode whilst the null safety compatible release could be released from its branch.

Please, prepare the branch for null safety support PR.

[lig]

flutter_colorpicker null safety PR: mchome/flutter_colorpicker#36

[lig]

#28 allows releasing the null safety compatible pre-release package

[lig]

@erickzanardo as #28 is merged, could you please release a null safety compatible pre-release version of the package?

[erickzanardo]

@erickzanardo as #28 is merged, could you please release a null safety compatible pre-release version of the package?

Done https://pub.dev/packages/dashbook/versions/0.1.0-nullsafety.0

[lig]

Thanks! I think this issue could be closed now. Nothing to do here until the main branch changes or null safety goes out of beta.