Missing dependency on setuptools

[vincentbernat]

Hey!

    language_name = reduced.language_name(language, max_distance)
  File "/nix/store/slc2gq45p8rm5fl1vc7phwlfa8jyqql6-python3-3.10.8-env/lib/python3.10/site-packages/langcodes/__init__.py", line 942, in language_name
    return self._get_name('language', language, max_distance)
  File "/nix/store/slc2gq45p8rm5fl1vc7phwlfa8jyqql6-python3-3.10.8-env/lib/python3.10/site-packages/langcodes/__init__.py", line 853, in _get_name
    from language_data.names import code_to_names
  File "/nix/store/slc2gq45p8rm5fl1vc7phwlfa8jyqql6-python3-3.10.8-env/lib/python3.10/site-packages/language_data/names.py", line 4, in <module>
    from language_data.util import data_filename
  File "/nix/store/slc2gq45p8rm5fl1vc7phwlfa8jyqql6-python3-3.10.8-env/lib/python3.10/site-packages/language_data/util.py", line 5, in <module>
    from pkg_resources import resource_filename
ModuleNotFoundError: No module named 'pkg_resources'

setuptools should be declared as a dependency to get pkg_resources. I am not familiar enough with Poetry to know where this should be specified.

[latk]

In any case, the use of setuptools seems to be deprecated. I got the following warning that originated in this library:

DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
    from pkg_resources import resource_filename

Instead, the standard library importlib.resources.files() function seems to be state of the art (for Python 3.9+).