What's Changed
* Refactoring collection by micha91 in https://github.com/DSD-DBS/polarion-rest-api-client/pull/50
Breaking Changes
* We removed the old `OpenAPIPolarionProjectClient`, which was deprecated since v0.4.0
* The checksum feature of `WorkItem`s was dropped as it wasn't working properly. Implement your own logic in your custom `WorkItem` class, if you need this feature. Look [here](https://github.com/DSD-DBS/capella-polarion/blob/07bdc25d57144f360a738722d9cfd8a506a5929c/capella2polarion/data_models.py#L29) for an example
* The description of `WorkItem`s are now of `TextContent` so that the `description_type` will be obsolete. You can still create `WorkItem`s in the old way, it will be handled and raise a deprecation warning. But if you access the description attribute of an object, a `TextContent` will be returned
**Full Changelog**: https://github.com/DSD-DBS/polarion-rest-api-client/compare/v1.1.4...v1.2.0