Bump packaging from 21.3 to 22.0 (#524)

Bumps [packaging](https://github.com/pypa/packaging) from 21.3 to 22.0.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@21.3...22.0)

---
updated-dependencies:
- dependency-name: packaging
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@ cachetools==5.2.0
 chardet==5.1.0
 gidgethub==5.2.1
 multidict==6.0.4
-packaging==21.3
+packaging==22.0
 py==1.11.0
 pyparsing==3.0.9
 six==1.16.0