Log Message:
py-django-registration: updated to 5.1.0

Version 5.1.0

* Adopted "DjangoVer" versioning.

* Supported Django versions are now 4.2, 5.0, and 5.1.

* Supported Python versions are now 3.9, 3.10, 3.11, 3.12, and 3.13.

* The base :class:`~django_registration.forms.RegistrationForm` has been
  completely rewritten, though in a backwards-compatible way. It is no longer a
  subclass of Django's ``UserCreationForm``, which means it is far more
  flexible with respect to custom user models (and for many cases, no longer
  requires a custom form subclass just to handle a custom user model).

* :class:`~django_registration.views.ActivationView` has also been rewritten,
  and with it parts of :ref:`the built-in activation-based workflow
  <activation-workflow>`. The primary change here is that ``ActivationView``
  now only attempts to activate the user account on an HTTP ``POST`` request
  (previously it would do so on ``GET``, which was increasingly unsafe due to
  email clients auto-following links). This is backwards-incompatible: the
  activation view now displays a form on ``GET``, and the templates involved
  have changed. See :ref:`the template documentation <default-templates>` for
  details of the required templates.