The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
-## [2.1.0] - 2021-dd-mm
+## [2.1.0] - 2021-28-08
+
+### Added
+
+- Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
### Breaking Changes