Fix test Client headers for Django 4.2

[kiendang]

Fix #1464

[sjdemartini]

Thanks for quickly adding this @kiendang! Looks good. just one point for quick discussion

[sjdemartini]

There's a warning at the top here https://setuptools.pypa.io/en/latest/pkg_resources.html saying

Use of pkg_resources is deprecated in favor of importlib.resources, importlib.metadata and their backports (importlib_resources, importlib_metadata). Some useful APIs are also provided by packaging (e.g. requirements and version parsing). Users should refrain from new usage of pkg_resources and should work to port to importlib-based solutions.

Instead of parse_version(), it looks like we could use https://packaging.pypa.io/en/stable/version.html (from packaging.version import parse). And for getting the currently-installed django version string, it looks like import django; django.get_version() would work (or alternatively importlib.metadata.version seems to be the substitute for get_distribution("...").parsed_version).

Unsure how important this deprecation warning is, but seems like it may be worthwhile to avoid the new code depending on this, as they suggest.

---

Another alternative could be something like this (if we want to avoid packaging for instance):

import django

_DJANGO_VERSION_AT_LEAST_4_2 = django.VERSION[0] > 4 or (django.VERSION[0] >= 4 and django.VERSION[1] >= 2)

[kiendang]

@sjdemartini @superlevure Thanks for the review. I know about pkg_resources being deprecated in favor of importlib... modules. However went for pkg_resources.get_distribution("...").parsed_version here since we need to compare 2 semvers while importlib.metadata.version only returns the version string, unparsed.

django.VERSION looks like exactly what we need which I was not aware of. Will convert to that. Thanks for pointing that out!

[superlevure]

The usage of pkg_resources is deprecated: https://setuptools.pypa.io/en/latest/pkg_resources.html

How about using:

from django import VERSION
print(VERSION)
# (4, 1, 11, 'final', 0)

instead?

[superlevure]

Looks like @sjdemartini beat me to it