What's Changed
* remove reference to study metadata schema by KerstenBreuer in https://github.com/ghga-de/ghga-message-schemas/pull/6
* fix package data and bump version to 0.2.2 by KerstenBreuer in https://github.com/ghga-de/ghga-message-schemas/pull/9
* refactor schemas into a dictionary by KerstenBreuer in https://github.com/ghga-de/ghga-message-schemas/pull/14
**Full Changelog**: https://github.com/ghga-de/ghga-message-schemas/compare/0.2.0...0.3.0