TEST PR: combining Pr 178 and 180

[braingram]

Combined changes for #178 and #180 (I wasn't sure how to test this locally as I'm not sure how to apply the read the docs config changes to a local docs build).

Checklist

• [ ] added entry in CHANGES.rst (either in Bug Fixes or Changes to API)
• [ ] updated relevant tests
• [ ] updated relevant documentation
• [ ] updated relevant milestone(s)
• [ ] added relevant label(s)

[codecov[bot]]

Codecov Report

Patch coverage: 93.33% and project coverage change: +0.04 :tada:

Comparison is base (2ffdb84) 63.90% compared to head (3f794d2) 63.95%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #181 +/- ## ========================================== + Coverage 63.90% 63.95% +0.04% ========================================== Files 101 101 Lines 5555 5565 +10 ========================================== + Hits 3550 3559 +9 - Misses 2005 2006 +1 ``` | [Impacted Files](https://app.codecov.io/gh/spacetelescope/stdatamodels/pull/181?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=spacetelescope) | Coverage Δ | | |---|---|---| | [src/stdatamodels/fits\_support.py](https://app.codecov.io/gh/spacetelescope/stdatamodels/pull/181?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=spacetelescope#diff-c3JjL3N0ZGF0YW1vZGVscy9maXRzX3N1cHBvcnQucHk=) | `90.27% <93.33%> (-0.01%)` | :arrow_down: |

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