backwards compatibility with ucan 0.8?

[tennox]

Summary

Originally posted on discord

Problem

A UCAN encoded from nftstorage/ucan-storage is not accepted by rs-ucan because of the missing field ucv.

found via git blame that in <v0.9 ucv was in the header, and in 0.10 in the payload..

Impact

Can't use TS-ucan with rs-ucan

Solution

Posted an issue to update TS-ucan https://github.com/ucan-wg/ts-ucan/issues/105 ...

but what about backwards compatibility? Too much work for pre-1.0? Or actually wanted?