missing dependency on packaging

[asottile]

#696 contains an unconditional import of packaging which is not depended on by autopep8:

Traceback (most recent call last):
  File "/home/asottile/.cache/pre-commit/repoanrqz_f1/py_env-python3.10/bin/autopep8", line 5, in <module>
    from autopep8 import main
  File "/home/asottile/.cache/pre-commit/repoanrqz_f1/py_env-python3.10/lib/python3.10/site-packages/autopep8.py", line 87, in <module>
    from packaging.version import parse as parse_version
ModuleNotFoundError: No module named 'packaging'

[paugier]

Note that autopep8 2.0.3 is broken by this bug. It would be nice to quickly have a new release containing the fix.