Prepare release 0.4.0 (#177)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2021-11-17
+
 ### Changed
 
 - Add prefix `Offer` to serialized public offer ([#173](https://github.com/farcaster-project/farcaster-core/pull/173))
@@ -73,7 +75,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Messages exchanged between farcaster-node's microservices
 - Tasks and blockchain events used by syncers
 
-[Unreleased]: https://github.com/farcaster-project/farcaster-core/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/farcaster-project/farcaster-core/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/farcaster-project/farcaster-core/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/farcaster-project/farcaster-core/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/farcaster-project/farcaster-core/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/farcaster-project/farcaster-core/compare/33ed7f975670c79d768d74e3fd5cf7d55e011a18...v0.1.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "farcaster_core"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Farcaster Devs"]
 documentation = "https://docs.rs/farcaster_core"
 homepage = "https://github.com/farcaster-project/farcaster-core"