Replace pkg_resources with importlib and add python 3.13 to test suite.

[chrisjonesBSU]

PR Summary:

I'm trying to fix some of the deprecation errors we're getting in the mosdef packages. One of them is coming from foyer with the use of pkg_resources.

pkg_resources will be removed in python 3.13

Note: This PR is not compatible with python 3.9, so we can't merge it until we want to drop 3.9 support and add 3.13.

PR Checklist

---

• Includes appropriate unit test(s)
• Appropriate docstring(s) are added/updated
• Code is (approximately) PEP8 compliant
• Issue(s) raised/addressed?

[chrisjonesBSU]

It looks like the entry points methods in python 3.9 is different from python >= 3.10. So, that means we can't support both 3.9 and 3.13 whenever it's released. We can table these changes until we're ready to move on to python >= 3.10.

[codecov]

Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.

Project coverage is 62.02%. Comparing base (2707210) to head (31f3626).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #574      +/-   ##
==========================================
- Coverage   62.04%   62.02%   -0.02%     
==========================================
  Files          16       16              
  Lines        1665     1667       +2     
==========================================
+ Hits         1033     1034       +1     
- Misses        632      633       +1     

[CalCraven]

I don't think it's necessarily the right call here, but we could opt for using
from platform import python_version
to handle the differentiation from python 3.9-3.13 in this PR. Only if we didn't want to wait until we have to fully drop 3.9 to merge this PR.

[chrisjonesBSU]

I don't think it's necessarily the right call here, but we could opt for using from platform import python_version to handle the differentiation from python 3.9-3.13 in this PR. Only if we didn't want to wait until we have to fully drop 3.9 to merge this PR.

I say we just wait. Maybe at the next dev meeting we can start talking about the plan to drop 3.9 and add 3.13, which will be officially released next month I believe.