Support Django 5.2 and Python 3.13, drop Python 3.8#388

Gagaro merged 3 commits intomakinacorpus:mastermakinacorpus/django-leaflet:masterfrom

adamchainz:django_5.2_python_3.13adamchainz/django-leaflet:django_5.2_python_3.13Copy head branch name to clipboard