Cardano: Conway certificates and tagged sets

[jaskp]

Update with select Cardano Conway features:

• Transactions with new stake registration and deregistration certificates and a DRep vote delegation certificate (does not include any new key derivations nor voting procedures)
• Flag that globally sets the CBOR encoding of "sets" to include the 258 tag. Without it, "sets" are just plain CBOR arrays.
• Increase of URL length limit from 64 to 128 bytes

Resources: https://github.com/IntersectMBO/cardano-ledger/blob/master/eras/conway/impl/cddl-files/conway.cddl https://github.com/cardano-foundation/CIPs/tree/master/CIP-0005 https://github.com/cardano-foundation/CIPs/tree/master/CIP-1694 https://sancho.network/tools-resources/faq/#4-certificate-and-transaction-field-witnesses-and-deposits