0.2.3 (2023-01-30)
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Split up post in episodes and posts.

* Fixed [codecov](https://codecov.io) badge
* More information about the release process, so I don't have to guess every time I publish a new release
* Added mypy to pre-commit hooks and fixed some issues
* Fixed Post form in django admin (don't try to save body stream field)
* Fixed a little issue raising an exception when an unknown language is set for a code block
* Split up post page model in episodes and posts
* Renamed test files to make the names easier searchable
* Use a JSONField for the audio model to cache file sizes
* Removed to warnings showing up running migrations
* Added twitter player card metadata to episode detail page + single button player view