Bump packaging from 20.9 to 21.3

Bumps [packaging](https://github.com/pypa/packaging) from 20.9 to 21.3.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@20.9...21.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -62,7 +62,7 @@ def find_version(*file_paths):
         "requests==2.28.0",
         "GitPython==3.1.14",
         "PyYAML==5.4.1",
-        "packaging==20.9",
+        "packaging==21.3",
         "python-debian==0.1.39",
         "python-iptables==1.0.0",
         "MarkupSafe==2.0.1",