Update dependency packaging to v21.2

This MR contains the following updates:

Package	Update	Change
packaging	minor	==21.0 -> ==21.2

---

Release Notes

pypa/packaging

v21.2

Compare Source

• Update changelog entry for 21.1

Full Changelog: https://github.com/pypa/packaging/compare/21.1...21.2

v21.1

Compare Source

What's Changed

• Update branch names in release process in https://github.com/pypa/packaging/pull/444
• Update changelog for 21.0 in https://github.com/pypa/packaging/pull/449
• tags: make _platform_tags public in https://github.com/pypa/packaging/pull/446
• Add support for Python 3.10 in https://github.com/pypa/packaging/pull/461
• Update PyPy CI Specifier in https://github.com/pypa/packaging/pull/467
• Limit pyparsing to major version 2 in https://github.com/pypa/packaging/pull/471

New Contributors

• @​moyiz made their first contribution in https://github.com/pypa/packaging/pull/471

Full Changelog: https://github.com/pypa/packaging/compare/21.0...21.1

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about this update again.

---

• If you want to rebase/retry this MR, click this checkbox.

---

This MR has been generated by Renovate Bot.