Bump django-filter from 2.3.0 to 2.4.0

[dependabot-preview]

Bumps django-filter from 2.3.0 to 2.4.0.

Changelog

Sourced from django-filter's changelog.

Version 2.4.0 (2020-9-27)

• SECURITY: Added a MaxValueValidator to the form field for NumberFilter. This prevents a potential DoS attack if numbers with very large exponents were subsequently converted to integers.

  The default limit value for the validator is 1e50.

  The new NumberFilter.get_max_validator() allows customising the used validator, and may return None to disable the validation entirely.

• Added testing against Django 3.1 and Python 3.9.

  In addition tests against Django main development branch are now required to pass.

Commits

• 7821072 Postpone move to CalVer.
• fd5824e Restore version declaration in setup.py.
• c9daa68 Version 20.9.0.
• c045bbe Droped using bumpversion.
• b1f56ed Use single version reference from main module.
• 451d372 Update docs copyright year.
• 82c9a42 Added MaxValueValidator to NumberFilter.
• 2ebce74 Confirmed compatibility with Python 3.9. (#1270)
• 85c9572 Run tests with GitHub Actions
• d9f389f Update Jinja test dependency.
• Additional commits viewable in compare view

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