BIP32 test vector 5 should be added to tests and checked

[kristapsk]

See bitcoin/bips#921 and bitcoin/bitcoin#22836.

[dgpv]

Thanks for reminder, bitcointx was missing one check ("'when depth is 0, child_number must also be 0")

Fixed in e184f73

[kristapsk]

Any plans for a new release? Would like to add these test vectors to JoinMarket test suite too.

[dgpv]

This is small change and not a very important fix, I think. Not enough to warrant new release

I recently got taproot working (not yet pushed to github), and maybe the new release with support of taproot is close enough. But I will need to iron out the new APIs before that. I'll update on taproot progress in this issue: #57

[kristapsk]

I was in impression that taproot will not happen soon because of currently unstable libsecp256k1 ABI, but if we can already see some light at the end of the tunnel, that's great news!

[dgpv]

Well, the ABI problem is certainly there. It may or may not prevent the new release. I've made a new issue to discuss that: #59