[noissue]: Update django-filter requirement from ~=2.2.0 to ~=2.3.0

[dependabot-preview]

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

Release notes

Sourced from django-filter's releases.

Version 2.3.0

https://github.com/carltongibson/django-filter/blob/master/CHANGES.rst#version-230-2020-6-5

Changelog

Sourced from django-filter's changelog.

Version 2.3.0 (2020-6-5)

• Fixed import of FieldDoesNotExist. (#1127)
• Added testing against Django 3.0. (#1125)
• Declared support for, and added testing against, Python 3.8. (#1138)
• Fix filterset multiple inheritance bug (#1131)
• Allowed customising default lookup expression. (#1129)
• Drop Django 2.1 and below (#1180)
• Fixed IsoDateTimeRangeFieldTests for Django 3.1
• Require tests to pass against Django master.

Version 2.2 (2019-7-16)

• Added DjangoFilterBackend.get_schema_operation_parameters() for DRF 3.10+ OpenAPI schema generation. (#1086)
• Added lookup_expr to MultipleChoiceFilter (#1054)
• Dropped support for EOL Python 3.4

Version 2.1 (2019-1-20)

• Fixed a regression in FilterView introduced in 2.0. An empty QuerySet was incorrectly used whenever the FilterSet was unbound (i.e. when there were no GET parameters). The correct, pre-2.0 behaviour is now restored.

  A workaround was to set strict=False on the FilterSet. This is no longer necessary, so you may restore strict behaviour as desired.

• Added IsoDateTimeFromToRangeFilter. Allows From-To filtering using ISO-8601 formatted dates.

Version 2.0 (2018-7-13)

2.0 introduced a number of small changes and tidy-ups. Please see the migration guide:

https://django-filter.readthedocs.io/en/master/guide/migration.html#migrating-to-2-0

• Added testing for Python 3.7 (#944)
• Improve exception message for invalid filter result (#943)
• Test QueryDict against CSV filters (#937)
• Add renderer argument to render() method of BooleanWidget (#923)
• Fix lookups for reverse relationships (#915)
• Refactor backend filterset instantiation (#865)
• Improve view-related attribute name consistency (#867)
• Fix distinct call for range filters (#855)
• Fix empty value check for CSV range (#854)
• Rework DateRangeFilter (#852)
• Added testing for Django 2.1
• Rework 'lookup types' handling into LookupChoiceFilter (#851)
• Add linting and docs builds to CI (#850)
• Use DRF BooleanFilter for NullBooleanField (#844)
• Added Brazilian locale (#841)

... (truncated)

Commits

• 56eaae1 Version 2.3
• 737d75f Require tests to pass on latest.
• 7428e47 Fixed IsoDateTimeRangeFieldTests for Django 3.1
• 6fb5f3e Fix pinned dependencies (#1221)
• 1ebb03a Fixed E741 ambiguous variable name flake8 error.
• 9e9bb5f Adjust tox dependencies.
• eca2c1f Python 2 cleanups (#1186)
• 1880430 Fix docs typo (#1195)
• a5b2ace Fix docstring typos (#1206)
• 9305753 Corrected typo in test comment. (#1194)
• Additional commits viewable in compare view

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[daviddavis]

@dependabot rebase