Update django_extensions to 2.2.9

[pyup-bot]

This PR updates django_extensions from 2.2.1 to 2.2.9.

Changelog

2.2.9

-----

Changes:
- Fix: shell_plus, move notebook down the list of prefered shells
- Fix: sqldiff, fix KeyError when detecting missing (unique) indexes
- Improvement: encrypted fields, make it harder to use deprecated keyczar fields
- Locale: Removed empty localizations

2.2.8

-----

Changes:
- Locale: zh_Hans, removed as it generated UnicodeDecodeError errors (1478)

2.2.7

-----

Changes:
- Improvement: shell_plus, 865 always add manage.py basedir to path for notebook kernel
- Improvement: docs, add zh-Hans locale
- Improvement: runserver_plus, fix broken import for werkzeug v1.0.0
- Improvement: runserver_plus, 1461 fix always trying to load StaticFilesHandler
- Improvement: pipchecker, 1471 fix import of PipSession

2.2.6

-----

Changes:
- Improvement: travis, update pypy and pypy3 versions
- Improvement: shell_plus, ability to print location/traceback besides sql
- Improvement: runserver_plus, ability to print location/traceback besides sql
- Improvement: UniqueFieldMixin, Support Django 2.2 UniqueConstraint.condition
- Improvement: DEFAULT_MYSQL_ENGINES, add mysql.connector.django
- Improvement: shell_plus, allow setting SHELL_PLUS="notebook"
- Improvement: shell_plus, add -c/--command to shell_plus mirroring django's shell command
- Fix: shell_plus, fix postgresql debug wrapper on django 3.0 or higher
- Fix: runserver_plus, fix postgresql debug wrapper on django 3.0 or higher

2.2.5

-----

Changes:
- Improvement: travis, add Python 3.8
- Improvement: setup.py, update classifiers

2.2.4

-----

Changes:
- Improvement: RandomCharField, Support unique_together
- Improvement: export_emails, add settings for overriding queryset fields, order_by and the full_name function

2.2.3

-----

Changes:
- Fix: admin widgets, fix import of static template tag (part 2)

2.2.2

-----

Changes:
- Fix: autoslugfield, find unique method overrideable
- Fix: notes, do not replace dot in template dirs
- Fix: admin widgets, fix import of static template tag
- Improvement: print_user_for_session, use session backend
- Improvement: sqlcreate, postgis support
- Improvement: graph_models, permit combination of includes and excludes
- Improvement: Adds missing GIS engine to DEFAULT_MYSQL_ENGINES
- Improvement: sqldiff, use lowercase field names in MySQL
- Improvement: sqldiff, mysql code could duplicate AUTO_INCREMENT and UNSIGNED statements

Links

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