[Resolve #1478] Update to latest packaging

[alex-harvey-z3q]

This removes what appeared to be an unnecessary restraint on the packaging dependency in poetry.lock and pyproject.toml and regenerates to use latest.

PR Checklist

• [x] Wrote a good commit message & description [see guide below].
• [x] Commit message starts with [Resolve #issue-number].
• [ ] Added/Updated unit tests.
• [ ] Added/Updated integration tests (if applicable).
• [x] All unit tests (poetry run tox) are passing.
• [x] Used the same coding conventions as the rest of the project.
• [x] The new code passes pre-commit validations (poetry run pre-commit run --all-files).
• [x] The PR relates to only one subject with a clear title. and description in grammatically correct, complete sentences.

Approver/Reviewer Checklist

• [ ] Before merge squash related commits.

Other Information

Guide to writing a good commit