Bump pytest-django from 3.8.0 to 4.4.0 (from PR #449)

Bumps [pytest-django](https://github.com/pytest-dev/pytest-django) from 3.8.0 to 4.4.0.
- [Release notes](https://github.com/pytest-dev/pytest-django/releases)
- [Changelog](https://github.com/pytest-dev/pytest-django/blob/master/docs/changelog.rst)
- [Commits](pytest-dev/pytest-django@v3.8.0...v4.4.0)

requirements.txt

@@ -321,9 +321,9 @@ py==1.8.1 \
 pytest==5.4.1 \
     --hash=sha256:0e5b30f5cb04e887b91b1ee519fa3d89049595f428c1db76e73bd7f17b09b172 \
     --hash=sha256:84dde37075b8805f3d1f392cc47e38a0e59518fb46a431cfdaf7cf1ce805f970
-pytest-django==3.8.0 \
-    --hash=sha256:456fa6854d04ee625d6bbb8b38ca2259e7040a6f93333bfe8bc8159b7e987203 \
-    --hash=sha256:489b904f695f9fb880ce591cf5a4979880afb467763b1f180c07574554bdfd26
+pytest-django==4.4.0 \
+    --hash=sha256:65783e78382456528bd9d79a35843adde9e6a47347b20464eb2c885cb0f1f606 \
+    --hash=sha256:b5171e3798bf7e3fc5ea7072fe87324db67a4dd9f1192b037fed4cc3c1b7f455
 zipp==3.1.0 \
     --hash=sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b \
     --hash=sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96