Update django-extensions requirement from ~=2.2.9 to ~=3.1.2 in /config

[dependabot-preview]

Updates the requirements on django-extensions to permit the latest version.

Changelog

Sourced from django-extensions's changelog.

3.1.2

Changes:

• Improvement: shell_plus, not save ipython history when using Jupyter
• Improvement: docs, fix spelling mistakes
• Improvement: tests, move to Github Actions instead of Travis
• Improvement: drop_test_database, delete all cloned test databases (#1637)
• Improvement: setup.py, Added minimum Django>=2.2 version to PyPI package
• Improvement: shell_plus, fix --command globals / locals error

3.1.1.post1

Changes:

• Improvement: setup.py, Added minimum Django>=2.2 version to PyPI package

3.1.1

Changes:

• Improvement: graph_models, add option --app-labels
• Improvement: shell_plus, update shell_plus for jupyterlab 3
• Improvement: tests, add Python 3.9

3.1.0

Changes:

• Improvement: pipchecker, sleep 60s if pypi raises a fault
• Improvement: add django_zero_downtime_migrations to list of supported postgresql engines
• Improvement: use list of supported database engines from settings for all database commands
• Improvement: reset_db, documentation
• Fix: tests, Python 3.9 fixes for some tests
• Fix: runserver_plus, parsing of RUNSERVER_PLUS_EXTRA_FILES

3.0.9

Changes:

• Improvement: runserver_plus, survive syntax and configuration errors part II
• Improvement: tests, refactor test runner
• Improvement: sqlcreate, support postgresql unix domain socket

3.0.8

... (truncated)

Commits

• 4c61475 v3.1.2
• bf745e2 merge branch 'master' of github.com:django-extensions/django-extensions
• fe5f961 fix shell_plus --command globals / locals error
• 29af891 Merge commit '2c08a51'
• 2c08a51 v3.1.1.post1 added minimum Django>=2.2 version
• b93fd6b Set minimum django version
• a4ab865 Have drop_test_database delete all cloned test databases (#1637)
• ef3b3ab Gh actions badges (#1647)
• 7f34f47 Gh actions (#1646)
• 5f74d76 Remove comma before "and"
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #286.