Null safety not supported

[pwa-tapptic]

Would it be possible to migrate the lib to Dart with null safety?
I wanted to add E2EE into my project but as soon as I try to run the project with the lib integrated I get a build error:

Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:virgil_e3kit

I took a look at lib's code and it should be relatively simple to migrate, quick help would be appreciated!

[ShahzadUmarBaig]

I tried making it null safe some time ago through the dart migration tool but it failed, It needs someone with the knowledge to migrate it.