- Switch util::address::Payload::Pubkey variant to wrap
util:🔑:PublicKey
- Switch util::address::Address::p*k* constructors to use
util:🔑:PublicKey
- Fix tests for aforementioned switch
- Add convenience methods for util:🔑:PublicKey to
util:🔑:PrivateKey conversion
- Switch BIP143 tests to use util:🔑:PublicKey