Remove 1 warning - DeprecationWarning: pkg_resources is deprecated as an API

[bobleesj]

Problem

===================================================== warnings summary ======================================================
../../../miniconda3/envs/diffpy_utils_env/lib/python3.13/site-packages/diffpy.utils-3.0.0-py3.7.egg/diffpy/utils/version.py:29
  /Users/macbook/miniconda3/envs/diffpy_utils_env/lib/python3.13/site-packages/diffpy.utils-3.0.0-py3.7.egg/diffpy/utils/version.py:29: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
    from pkg_resources import resource_filename

Proposed solution

See https://setuptools.pypa.io/en/latest/pkg_resources.html as instructed

[bobleesj]

Similar to #144, this is coming from diffpy.utils

[sbillinge]

Odd, that should have been fixed by cookiecutter I think? Ok o fix manually but nice to understand why it want caught in the cut....

[bobleesj]

@sbillinge somehow my local mac installed an older version of diffpy.utils with python 3.13

I think installation issues will be removed once we release diffpy.utils supporting 3.13

[bobleesj]

I will close this issue once we have a brand new diffpy.utils