adjust version informations

CHANGELOG.md

@@ -4,7 +4,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](https://git.d3data.de/D3Private/linkmobility-php-client/compare/2.0.0...rel_2.x)
+## [Unreleased](https://git.d3data.de/D3Private/linkmobility-php-client/compare/2.0.1...rel_2.x)
+
+## [2.0.1](https://git.d3data.de/D3Private/linkmobility-php-client/compare/2.0.0...2.0.1) - 2022-07-28
+### Added
+- phpstan code checks
+
+### Changed
+- improve changelog
+- improve code quality
+
+### Fixed
+- wrong return type of LoggerHandler::getInstance
 
 ## [2.0.0](https://git.d3data.de/D3Private/linkmobility-php-client/compare/1.3.0...2.0.0) - 2022-07-19
 ### Changed