metadata for release `0.21.0`

[codecov[bot]]

Codecov Report

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

Project coverage is 97.68%. Comparing base (087a60d) to head (ef8089c). Report is 37 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #374 +/- ## ========================================== + Coverage 97.56% 97.68% +0.12% ========================================== Files 30 37 +7 Lines 2788 3365 +577 ========================================== + Hits 2720 3287 +567 - Misses 68 78 +10 ```

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[zacharyburnett]

did mk_sky_background get deprecated? https://github.com/spacetelescope/roman_datamodels/actions/runs/10268044787/job/28411458330#step:10:343

=========================== short test summary info ============================
FAILED tests/test_maker_utils.py::test_maker_utility_implemented[SkyBackground] - ValueError: Maker utility: mk_sky_background not implemented for class SkyBackground
FAILED tests/test_maker_utils.py::test_instance_valid[SkyBackground] - ValueError: Maker utility: mk_sky_background not implemented for class SkyBackground
FAILED tests/test_maker_utils.py::test_no_extra_fields[SkyBackground] - ValueError: Maker utility: mk_sky_background not implemented for class SkyBackground
FAILED tests/test_stnode.py::test_copy[SkyBackground] - ValueError: Maker utility: mk_sky_background not implemented for class SkyBackground
FAILED tests/test_stnode.py::test_serialization[SkyBackground] - ValueError: Maker utility: mk_sky_background not implemented for class SkyBackground
================== 5 failed, 2102 passed in 82.00s (0:01:22) ===================

[PaulHuwe]

No, that was just added.

[PaulHuwe]

I see the issue.. resolving now.

[PaulHuwe]

I merged a PR, rerunning the tests.

[zacharyburnett]

looks like that fixed it!