packaging is required by setup.py and may not be available

[swryan]

Description

Installing Dymos currently requires the packaging package to be pre-installed, as it is used to check for Python 3.12:

# playwright dependencies are currently incompatible with python 3.12
if Version(python_version()) < Version('3.12.0'):
    optional_dependencies['test'].extend(['playwright>=1.20', 'aiounittest'])

This is no longer necessary, as playwright has since been updated to be compatible with Python 3.12

Example

Processing ./dev/dymos/dist/dymos-1.10.0.tar.gz
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [6 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "/tmp/pip-req-build-p1x2ha8z/setup.py", line 1, in <module>
          from packaging.version import Version
      ModuleNotFoundError: No module named 'packaging'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Dymos Version

1.10.0

Relevant environment information

No response