PEP 420 Deprecation warning

[codders]

I'm seeing this deprecation warning in my Python 3.11 project:

../../../.local/share/virtualenvs/w4af-7R6LdAnp/lib/python3.11/site-packages/pkg_resources/__init__.py:2804
139
  /home/runner/.local/share/virtualenvs/w4af-7R6LdAnp/lib/python3.11/site-packages/pkg_resources/__init__.py:2804: DeprecationWarning: Deprecated call to `pkg_resources.declare_namespace('phply')`.
140
  Implementing implicit namespace packages (as specified in PEP 420) is preferred to `pkg_resources.declare_namespace`. See https://setuptools.pypa.io/en/latest/references/keywords.html#keyword-namespace-packages
141
    declare_namespace(pkg)

I've opened a PR (#59) to address this, though I've not really tested if that does the right thing.