allow python 3.13

[braingram]

This PR:

• adds python 3.13 testing to the CI: https://github.com/spacetelescope/drizzle/actions/runs/10473588949/job/29005811343?pr=156
• allows python 3.13 in pyproject.toml
• re-enables to previously disabled tox devdeps test https://github.com/spacetelescope/drizzle/actions/runs/10473588949/job/29005812771?pr=156

I added the devdeps change only because I saw the comment: https://github.com/spacetelescope/drizzle/blob/f8ea30dc5b1eda828aa1e4191c9d9205f01551ae/.github/workflows/ci.yml#L35-L36 Since numpy 2.0 is out I figured I'd see if it works again (which it did). Let me know if it's preferable to have this change in a different PR.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.29%. Comparing base (0104065) to head (a0f8481). Report is 20 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #156 +/- ## ======================================= Coverage 75.29% 75.29% ======================================= Files 7 7 Lines 344 344 ======================================= Hits 259 259 Misses 85 85 ```

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[braingram]

Now python 3.13 is passing... I'm inclined to say we leave the <3.13 pin in place for the next release and remove it only when it's enabled in the tests.