Bump django-axes from 1.7.0 to 5.0.6

Bumps [django-axes](https://github.com/jazzband/django-axes) from 1.7.0 to 5.0.6.
- [Release notes](https://github.com/jazzband/django-axes/releases)
- [Changelog](https://github.com/jazzband/django-axes/blob/master/CHANGES.rst)
- [Commits](jazzband/django-axes@1.7.0...5.0.6)

setup.py

@@ -50,7 +50,7 @@
         'Jinja2==2.10',
         'django==2.0.13',
         'requests==2.20.1',
-        'django-axes==1.7.0',
+        'django-axes==5.0.6',
         'djangorestframework==3.7.4',
         'django-reversion==3.0.1',
         'django-compressor==2.2',