**Release created on: 07.01.2022 - 02:06:31**
New Features
* Abstract interface for key-value based configurations (e.g. from JSON, TOML, YAML).
* Configuration parser reading YAML files based on `ruamel.yaml`.
* Supporting variables.
* Support for `extras_require`.
* Read additional requirement files (documentation, unit test, packaging) and assemble entries for `extras_require`.
* Add an `all` entry to `extras_require` to summarize all previous requirements.
Changes
* Improvements to doc-strings for Codacy.
Bug Fixes
*None*