Bump to latest Django LTS and lift other dependencies while giving some slack on the version requirements in `setup.py` so it won't be too hard to bump to this release.
Feature
* **core** Rename the basemodel's `meta` field to `metainfo` in order to respect reserved words of [django-restframework-json-api](https://github.com/django-json-api/django-rest-framework-json-api/blob/main/CHANGELOG.md#430---2021-12-10) ([`be444a6`](https://github.com/projectcaluma/emeis/pull/298/commits/be444a622b05139df041b2530018672cb95dad91))
Breaking
* Rename basemodel's `meta` field to `metainfo`