These updates help payjoin-ffi play nicely.
- Prepare Payjoin PSBT with no output keypaths (Prepare Payjoin PSBT with no output keypaths
- Restore sender UTXOs before Payjoin Signing (Restore sender UTXOs before Payjoin Signing
- Deserialize url::Url with url/serde feature instead of custom deserializer (Use url/serde)