Add support for dart 2.10.5

[michaelloewenstein]

Current support is >=1.24.0 <=2.0.0 while Dart has newer versions

[insinfo]

I'm also interested in this as I need to read a large database with DICOM files and I need to extract the images in JPEG

Seems like this repo, sadly is dead. Such a great idea and tons of work. I need null-safety.