Update pytest-django from 3.4.4 to 3.4.5 (#555)

Author: pyup-bot

requirements-development.txt

@@ -10,7 +10,7 @@ isort==4.3.4
 mock==2.0.0
 pytest==4.0.2
 pytest-cov==2.6.0
-pytest-django==3.4.4
+pytest-django==3.4.5
 pytest-factoryboy==2.0.2
 recommonmark==0.4.0
 Sphinx==1.8.3