support python 3.13

[braingram]

Update CI to test with python 3.13.

jwst downstream failure is unrelated see #191

Tasks

• update or add relevant tests
• update relevant docstrings and / or docs/ page
• Does this PR change any API used downstream? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see below for change types)
  • run regression tests with this branch installed ("git+https://github.com/<fork>/stpipe@<branch>")
    • jwst regression test
    • romancal regression test

news fragment change types...

• changes/<PR#>.feature.rst: new feature
• changes/<PR#>.bugfix.rst: fixes an issue
• changes/<PR#>.doc.rst: documentation change
• changes/<PR#>.removal.rst: deprecation or removal of public API
• changes/<PR#>.misc.rst: infrastructure or miscellaneous change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.26%. Comparing base (3a03c8c) to head (c55d0d2).
Report is 29 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (3a03c8c) and HEAD (c55d0d2). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (3a03c8c)	HEAD (c55d0d2)
	4	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #193       +/-   ##
===========================================
- Coverage   94.66%   75.26%   -19.40%     
===========================================
  Files          37       34        -3     
  Lines        3109     2689      -420     
===========================================
- Hits         2943     2024      -919     
- Misses        166      665      +499     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zacharyburnett]

LGTM with a minor edit to the change log