add relevant changelog info

Author: vesavlad

CHANGELOG.md

@@ -17,7 +17,18 @@ 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]
+## [2.1.0] - 17-02-2023
+### Changed
+- Bumped spdlog version
+- Bumped buildcache
+- Bumped catch2 testing framework used for gtfs lib tests
+- fixed building on newer ubuntu compilers
+
+## [2.0.1] - 05-03-2022
+### Fixes
+- Fixed wrong generation of interpolated times.
+
+## [2.0.0] - 24-01-2021
 ### Added
 - changelog support
 - use new dependency management system named [pkg](https://github.com/motis-project/pkg)