Support Python 3.13, drop 3.10

[bobleesj]

PLEASE READ FOR GITHUB MAINTAINERS:

If your package supports Python 3.10, 3.11, 3.12:

• add requires-python = ">=3.10, <3.13"

If your package supports Python 3.11, 3.12, 3.13:

• add requires-python = ">=3.11, <3.14"

---

For this PR reviewer:

Closes #144

conda create -n diffpy.srmise_env python=3.13
conda install --file requirements/conda.txt --file requirements/test.txt
pip install -e . --no-deps

Testing result:

No changes were needed.

[bobleesj]

@sbillinge ready for review

[sbillinge]

Talking to Tieqiong, we realize that in the toml file we want the line requires-python = ">=3.10" to be changed to 3.11 but also a <=3.13 (not sure the right syntax). In the future when conda-forge migrates to the next python version this will then fail with an unresolved error and not just break in the code.

This applies to all the packages so we need to let everyone know and have them update their packages this way.

[bobleesj]

@sbillinge ready for review - requires-python = ">=3.11, <=3.13" added

[bobleesj]

@sbillinge Added an news item for requires-python = ">=3.11, <=3.13", ready for review

[bobleesj]

@sbillinge Okay - >=3.11, <3.14 added. Just need to fix the issue titles

[bobleesj]

@sbillinge Updated the news file as provided in the general group channel. Ready for review