Django 4 support

[jayvdb]

For tests are failing instantiating middleware: TypeError: __init__() missing 1 required positional argument: 'get_response'

[   37s] ______ MessagesAssertionsMixin.test_assert_messages_sent_when_really_sent ______
[   37s] 
[   37s] self = <testproject.testapp.tests.test_assertions.MessagesAssertionsMixin testMethod=test_assert_messages_sent_when_really_sent>
[   37s] 
[   37s]     def test_assert_messages_sent_when_really_sent(self):
[   37s]         request = self.factory.get(data={'send': '3'})
[   37s]     
[   37s] >       self.view(request)
[   37s] 
[   37s] testapp/tests/test_assertions.py:132: 
[   37s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   37s] ../djet/testcases.py:62: in view
[   37s]     self._load_middleware()
[   37s] ../djet/testcases.py:88: in _load_middleware
[   37s]     self._load_old_middleware()
[   37s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   37s] 
[   37s] self = <testproject.testapp.tests.test_assertions.MessagesAssertionsMixin testMethod=test_assert_messages_sent_when_really_sent>
[   37s] 
[   37s]     def _load_old_middleware(self):
[   37s]         middleware_classes = self.middleware_classes or []
[   37s]         for mw_class in middleware_classes:
[   37s]             mw_class, mw_types = self._unpack_middleware(mw_class)
[   37s] >           mw_instance = mw_class()
[   37s] E           TypeError: __init__() missing 1 required positional argument: 'get_response'
[   37s] 
[   37s] ../djet/testcases.py:96: TypeError
[   37s] =============================== warnings summary ===============================
[   37s] ../../../../../../usr/lib/python3.9/site-packages/django/conf/__init__.py:199
[   37s]   /usr/lib/python3.9/site-packages/django/conf/__init__.py:199: RemovedInDjango50Warning: The default value of USE_TZ will change from False to True in Django 5.0. Set USE_TZ to False in your project settings if you want to keep the current default behavior.
[   37s]     warnings.warn(
[   37s] 
[   37s] -- Docs: https://docs.pytest.org/en/stable/warnings.html
[   37s] =========================== short test summary info ============================
[   37s] FAILED testapp/tests/test_assertions.py::MessagesAssertionsMixin::test_assert_messages_passes_when_matched_message
[   37s] FAILED testapp/tests/test_assertions.py::MessagesAssertionsMixin::test_assert_messages_raise_assertion_error_when_no_matching_message
[   37s] FAILED testapp/tests/test_assertions.py::MessagesAssertionsMixin::test_assert_messages_sent_when_not_sent
[   37s] FAILED testapp/tests/test_assertions.py::MessagesAssertionsMixin::test_assert_messages_sent_when_really_sent