(v2) Add missing dependency packaging at min version 25

[chrisinmtown]

The recent switch from setup.py to pyproject.toml omitted dependency packaging

Fixes #2085

Changes proposed in this pull request:

• Restore package packaging to main project dependencies

[chrisinmtown]

Sorry for the churn. The current version of poetry seems to require the very latest version of packaging, which is 25. The v2 branch previously asserted minimum version 20 but that version lacks packaging.licenses and packaging.metadata, so poetry chokes when that version is installed as part of a py39-min run.

[chrisinmtown]

@RobbeSneyders @Ruwann would one of you please merge this PR then tag/trigger a workflow to release version 2.16.0rc1? I promise to test it immediately.

[chrisinmtown]

@Ruwann and @RobbeSneyders I'm really baffled at the delay here. The 2.15.0 release is broken, I opened this PR immediately after the problem was reported with a simple fix. That was over one week ago already. Would you please comment?

[RobbeSneyders]

I have not been involved in the release of 2.15, and as previously stated multiple times, am not interested in the ongoing maintenance of it.

Approving this based on @chrisinmtown's testing and analysis of the issue.

[RobbeSneyders]

Pre-release here

https://github.com/spec-first/connexion/releases/tag/2.15.1rc1

[chrisinmtown]

Thank you for merging this and thank you for creating the release candidate! I will test it shortly.

[chrisinmtown]

Thank you again, this RC passes my tests:

• Create and activate a new venv
• Install the RC via pip3 install --pre connexion==2.15.1rc1
• Launch connexion server on a simple YAML file pip3 install --pre connexion==2.15.1rc1
• Observe that the server starts without complaint ModuleNotFoundError: No module named 'packaging' (which is what happens for 2.15.0)

[chrisinmtown]

Please say what is required to promote 2.15.1 from RC to a normal release. Do you want additional commenters, approvers or something?

[RobbeSneyders]

Your review is fine. I will release it.

[chrisinmtown]

Your review is fine. I will release it.

Thanks, I'm glad to hear it, please do release this patch version.