Fix docs build on newer python versions

Author: codingjoe

CONTRIBUTING.rst

@@ -15,7 +15,7 @@ You may run the tests via::
 
 Documentation pull requests welcome. The Sphinx documentation can be compiled via::
 
-    uv run sphinx-build -b html docs docs/_build/html
+    uv run sphinx-build -W -b doctest -b html docs docs/_build/html
 
 Bug reports welcome, even more so if they include a correct patch.  Much
 more so if you start your patch by adding a failing unit test, and correct

docs/conf.py

@@ -2,7 +2,7 @@
 import pathlib
 import sys
 
-from pkg_resources import get_distribution
+from django_select2 import __version__ as release
 
 BASE_DIR = pathlib.Path(__file__).resolve(strict=True).parent.parent
 
@@ -20,12 +20,9 @@
 
 
 project = "Django-Select2"
-author = "Johannes Hoppe"
-copyright = "2017-2020, Johannes Hoppe"
-release = get_distribution("django_select2").version
+author = "Johannes Maron"
 version = ".".join(release.split(".")[:2])
 
-
 master_doc = "index"  # default in Sphinx v2