Bump packaging from 20.0 to 20.9 in /platform

[dependabot-preview]

Bumps packaging from 20.0 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.

20.4

No release notes provided.

20.3

No release notes provided.

20.2

No release notes provided.

20.1

• Fix a bug caused by reuse of an exhausted iterator. (#257)

Changelog

Sourced from packaging's changelog.

20.9 - 2021-01-29

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

20.8 - 2020-12-11

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

20.7 - 2020-11-28

No unreleased changes.

20.6 - 2020-11-28

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

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

20.5 - 2020-11-27

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

20.4 - 2020-05-19

• Canonicalize version before comparing specifiers. (282)
• Change type hint for canonicalize_name to return packaging.utils.NormalizedName. This enables the use of static typing tools (like mypy) to detect mixing of normalized and un-normalized names.

20.3 - 2020-03-05

• Fix changelog for 20.2.

20.2 - 2020-03-05

... (truncated)

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

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[SumoSourabh]

Closing the pull request as the dependency has been updated by #455