Update to Django 4

[feaselkl]

The newest release of Django as of the time of this issue opening is 4.04. The current version of Django supported in this repo is 1.9X.

Key changes to make include:

• Calls to load staticfiles should now call load static instead.
• django.utils.translation.ugettext_lazy is now django.utils.translation.gettext_lazy
• MIDDLEWARE_CLASSES has been renamed to MIDDLEWARE.
• Session authentication middleware has been deprecated.
• The url() function in django.conf.urls is now re_path().
• The Login operation in django.contrib.auth has been replaced with LoginView.
• Requirements.txt should indicate this new version.

A PR for these changes is forthcoming.