Update django-extensions to 2.0.6

[pyup-bot]

This PR updates django-extensions from 2.0.0 to 2.0.6.

Changelog

2.0.6

-----

Changes:
- Fix: shell_plus, Fix of deprecation warning in collision resolvers

2.0.5

-----

Changes:
- Improvement: setup.py, Use PEP 508 when setuptools is version 36 or higher should fix issues with pipenv
- Fix: docs, Docs should show that django 2.0 is supported

2.0.4

-----

Changes:
- Fix: setup.py, fix installation of typing in python < 3.5

2.0.3

-----

Changes:
- Fix: shell_plus, python 2.7 support broken due to use of Python3 super()

2.0.2

-----

Changes:
- Improvement: sqldiff, add --include-defaults to include default value in missing field for sqldiff 1064

2.0.1

-----

Changes:
- Fix: setup.py, do not include `typing` requirement in recent versions of Python
- Improvement: shell_plus, add support for using -- to pass cli argument directly to underlying python shell implementation
- New: generate_password, Generates a new password based on `BaseUserManager.make_random_password`

Links

• PyPI: https://pypi.python.org/pypi/django-extensions
• Changelog: https://pyup.io/changelogs/django-extensions/
• Repo: http://github.com/django-extensions/django-extensions

[pyup-bot]

Closing this in favor of #114