Changelog update (#36)

Co-authored-by: Levi <[email protected]>

Author: ljamt

CHANGELOG.md

@@ -4,6 +4,9 @@ For a more detailed list of all changes, click the header links for each version
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
+### [v0.9.0] - 2022-04-20
+Using libcosim v0.9.0. Refer to `libcosim` [changelog](https://github.com/open-simulation-platform/libcosim/blob/master/CHANGELOG.md) for details.
+
 ### [v0.8.3] - 2021-11-29
 Using libcosim v0.8.3. Refer to `libcosim` [changelog](https://github.com/open-simulation-platform/libcosim/blob/master/CHANGELOG.md) for details.
 
@@ -16,3 +19,4 @@ First release as separate library. `libcosimc` was part of the `libcosim` reposi
 
 [v0.8.2]: https://github.com/open-simulation-platform/libcosimc/compare/v0.7.0...v0.8.2
 [v0.8.3]: https://github.com/open-simulation-platform/libcosimc/compare/v0.8.2...v0.8.3
+[v0.9.0]: https://github.com/open-simulation-platform/libcosimc/compare/v0.8.3...v0.9.0