kotlinx.serialization support

[JanMalch]

I would love to see kotlinx.serialization support out of the box, like kotlinx.datetime does it. What do you think?

[kendy]

Hello, I don't need it myself, so it's unlikely I'd get to implementing it, but I'd love to integrate patches if you provide them. Maybe it is just a matter of the right annotation?

If you get to implementing it, please just create pull requests, I'll review & merge. Hope this helps!