Implement maps support

[eigenein]

https://developers.google.com/protocol-buffers/docs/proto3#maps

[Mokto]

Hi & thanks for your library!

Any ETA on that? Or any alternative we can use for now?

I had to use lists with key/value to solve that issue.

[eigenein]

👋 @Mokto

That's a tricky one to tell. I'm working on V3 nowadays (almost there), and only then I can start addressing the old issues which I never got my hands on 😃

I guess, the best workaround, for now, is to implement the MapFieldEntry, and indeed use a list of those (optionally, with property getter/setter to expose it as a dictionary)

[Mokto]

Thanks a lot!