Add Nullsafety support

[prateekmedia]

https://dart.dev/null-safety/migration-guide

[asjqkkkk]

no problem

[prateekmedia]

@asjqkkkk Please also update flare_flutter to 3.0.0 before publishing to pub.dev in example project.

Also do below things:

• Update version in pubspec.yaml
• Add CHANGELOG for new version
• Update README, for new version

[lakshyapunhani]

Is it updated for null safety? @asjqkkkk

[prateekmedia]

Is it updated for null safety? @asjqkkkk

on github  - true
on pub.dev - false

[Scienticious]

Hello @prateekmedia, Please convert this package on null safe in the pub.dev

[prateekmedia]

@Scienticious I don't have access to pub.dev of circle_list, Please contact @asjqkkkk for that, he may be busy so till then you can use github repo in your pubspec.yaml.

[asjqkkkk]

v1.0.5 is ok for this issue