DOC: CHANGELOG.md

CHANGELOG.md

@@ -5,20 +5,11 @@ 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] ##
-
-### Added ###
+## [0.2.1] - 2023-02-17 ##
 
 ### Changed ###
 
-### Deprecated ###
-
-### Removed ###
-
-### Fixed ###
-
-### Security ###
-
+- Updated necessary Conan version to 1.54.
 
 ## [0.2.0] - 2022-09-26 ##