Update django-extensions to 2.1.9

[pyup-bot]

This PR updates django-extensions from 2.1.5 to 2.1.9.

Changelog

2.1.9

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Changes:
- Fix: show_urls, fix for traceback on multi language sites
- Improvement: reset_db, fix typo's in help test

2.1.8

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Changes:
- New: HexValidator, validate hex strings
- Improvement: reset_db, move settings to `django_settings.settings` which makes it easier to override.
- Improvement: AutoSlugField, extend support for custom slugify function
- Fix: runprofileserver, fix autoreloader for newer Django versions

2.1.7

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Changes:
- New: test, many many more tests :-) thanks everybody
- New: docs, many documentation updates
- New: graph_model, add simple theming support and django2018 theme
- Improvement: ModificationDateTimeField, make modificationfield name modifiable
- Improvement: graph_model, option to not showrelations labels in the graph
- Improvement: reset_db, allow to override list of backends for database engines
- Improvement: reset_db, add psqlextra backend
- Improvement: runserver_plus, idle support
- Improvement: generate_secret_key, removed get_random_string in favour of get_random_secret_key
- Improvement: update_permissions, add create-only and update-only flags
- Improvement: update_permissions, update changed names of permission to match correct permission name
- Improvement: syncdata, add --database option
- Improvement: runscript, allow to override RUNSCRIPT_SCRIPT_DIR
- Fix: create_command, fix mknod error on macos
- Fix: runserver_plus, fix in resolving ssl certificate path
- Fix: sqldiff, fix hstorefield
- Deprecate: truncate_letters, use Django's truncatechars
- Deprecate: passwd, use Django's changepassword
- Deprecate: Keyczar encrypted fields, Keyczar is abandonned / deprecated

2.1.6

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Changes:
- Fix: runserver_plus, auto_reloader fix for compatibility with Django 2.2
- New: test, many many more tests :-) thanks kuter

Links

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