Bump packaging from 20.4 to 20.9

[dependabot]

Bumps packaging from 20.4 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)

Release 20.8

• Revert back to setuptools for compatibility purposes for some Linux distros (:issue:363)
• Do not insert an underscore in wheel tags when the interpreter version number is more than 2 digits (:issue:372)

20.7

No release notes provided.

20.6

No release notes provided.

20.5

No release notes provided.

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`)
20.8 - 2020-12-11

• Revert back to setuptools for compatibility purposes for some Linux distros (:issue:363)
• Do not insert an underscore in wheel tags when the interpreter version number is more than 2 digits (:issue:372)

20.7 - 2020-11-28

No unreleased changes.
20.6 - 2020-11-28

.. note:: This release was subsequently yanked, and these changes were included in 20.7.

• Fix flit configuration, to include LICENSE files (:issue:357)
• Make intel a recognized CPU architecture for the universal macOS platform tag (:issue:361)
• Add some missing type hints to packaging.requirements (issue:350)

20.5 - 2020-11-27

* Officially support Python 3.9 (:issue:`343`)
* Deprecate the ``LegacyVersion`` and ``LegacySpecifier`` classes (:issue:`321`)
* Handle ``OSError`` on non-dynamic executables when attempting to resolve
  the glibc version string.

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
• d93c6ee Bump for release
• 1534da5 Update noxfile.py for going back to setuptools
• b299c3d Add a changelog entry for reverting underscores in wheel tags
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)