Django-markdownx

Fix for cookie read.

Added:

- Support for Django 4 (retains backward compatibility with Django 3)
- Support for Python 3.9 and 3.10

Added:
- Support for Django 4 (retains backward compatibility with Django 2 and 3)
- Support for Python 3.9 and 3.10

Changed:
- Minor correction in German translation

Removed:
- Built documentation assets, which are now built via the CI.

Fixed:
- django's internal db field type

Added:
- support for Django 2 and 3
- support for python 3.6, 3.7 and 3.8

Removed:
- support of Django < 2
- python 2.7 code

Fixed:
- minor compatibility issues