Release v0.21

Crates

• nostr
• nostr-sdk
• nostr-sdk-net
• nostr-sdk-sqlite

What's Changed

• Complete NIP46 integration into nostr-sdk by @yukibtc in #81
• Refactoring nostr-sdk by @yukibtc in #83
• Fix: Relay Tag seralization by @thesimplekid in #82
• Blocking with_remote_signer by @thesimplekid in #84
• NIP46 delegation response by @thesimplekid in #85

Full Changelog: v0.20.0...v0.21.0