SigHashType

[Kixunil]

Since the update in bitcoin this type needs to be updated as well. However it's not obvious to me how and if it should be related to one of bitcoins types. It looks like RPC just accepts the string, so restricting it to any version is wrong? Thus bitcoincore-rpc should have its own?

The crate is dead anyway but would like to hear opinions of others that could be applicable to forks.

FYI @romanz for electrs version I just commented-out offending functionality since electrs doesn't need.