update changelog

Author: bleykauf

CHANGELOG.md

@@ -5,10 +5,17 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+* Refactor bit manipulation and remove `myhdl` dependency by @fsagbuya in https://github.com/linien-org/pyrp3/pull/12
+
 ## [v2.0.2]
 
 ### Fixed
 
 * Don't use setuptools_scm & specify version manually by @doronbehar in https://github.com/linien-org/pyrp3/pull/14
 
+[Unreleased]: https://github.com/linien-org/pyrp3/compare/v2.0.2...HEAD
 [v2.0.2]: https://github.com/linien-org/pyrp3/compare/v2.0.1...v2.0.2