Bump packaging from 20.8 to 20.9

[dependabot]

Bumps packaging from 20.8 to 20.9.

Release notes

Sourced from packaging's releases.

Release 20.9

• Run isort over the code base (:issue:377)
• Add support for the macosx_10_*_universal2 platform tags (:issue:379)
• Introduce packaging.utils.parse_wheel_filename() and parse_sdist_filename() (:issue:387 and :issue:389)

Changelog

Sourced from packaging's changelog.

20.9 - 2021-01-29

* Run `isort <https://pypi.org/project/isort/>`_ over the code base (:issue:`377`)
* Add support for the ``macosx_10_*_universal2`` platform tags (:issue:`379`)
* Introduce ``packaging.utils.parse_wheel_filename()`` and ``parse_sdist_filename()``
  (:issue:`387` and :issue:`389`)

Commits

• 53fd698 Bump for release
• faf1be8 Release from 'main', not 'master' (#391)
• 9120541 Change the return type for the build number portion of utils.parse_wheel_file...
• da68002 Add functions for parsing wheel and sdist filenames (#387)
• 1b26f84 Support "macosx_10_9_universal2" wheels (#380)
• 28d2fa0 Use isort (#377)
• 353f270 Bump for development
• See full diff in compare view

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[dependabot]

Looks like packaging is up-to-date now, so this is no longer needed.