Boyle Seo

I think supporting [extension types](https://github.com/dart-lang/language/blob/main/accepted/future-releases/extension-types/feature-specification.md) on records prop may be appropriate.

> I think supporting [extension types](https://github.com/dart-lang/language/blob/main/accepted/future-releases/extension-types/feature-specification.md) on records prop may be appropriate. I just realized it's not simple to do. convert::jsonEncode function cannot invoke toJson method anyway because extension types...

@blaugold This feature is very important for developing on Windows systems. See [this issue](https://github.com/invertase/melos/issues/470). Until this PR is merged, as a Windows user I have to manually run the script...