fix tests for new pyuvdata updates, new astropy deprecation warnings

[bhazelton]

Description

Tests were broken by a recent change to UVBase in pyuvdata and by a new astropy deprecation warning being triggered in lunarsky (I just filtered those for now, they need to be fixed in lunarsky). I also add a min versions CI.

Motivation and Context

Checklists:

Bug Fix Checklist:

• [x] I have read the contribution guide.
• [x] My code follows the code style of this project.
• [x] My fix includes a new test that breaks as a result of the bug (if possible).
• [ ] My change includes a breaking change
  • [ ] My change includes backwards compatibility and deprecation warnings (if possible).
• [ ] I have updated the CHANGELOG.

[codecov[bot]]

Codecov Report

Base: 99.81% // Head: 99.67% // Decreases project coverage by -0.13% :warning:

Coverage data is based on head (f07150d) compared to base (7c99fdd). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #196 +/- ## ========================================== - Coverage 99.81% 99.67% -0.14% ========================================== Files 5 6 +1 Lines 2157 2176 +19 ========================================== + Hits 2153 2169 +16 - Misses 4 7 +3 ``` | [Impacted Files](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyradiosky/pull/196?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RadioAstronomySoftwareGroup) | Coverage Δ | | |---|---|---| | [pyradiosky/skymodel.py](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyradiosky/pull/196/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RadioAstronomySoftwareGroup#diff-cHlyYWRpb3NreS9za3ltb2RlbC5weQ==) | `99.79% <100.00%> (+<0.01%)` | :arrow_up: | | [pyradiosky/\_\_init\_\_.py](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyradiosky/pull/196/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RadioAstronomySoftwareGroup#diff-cHlyYWRpb3NreS9fX2luaXRfXy5weQ==) | `62.50% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RadioAstronomySoftwareGroup). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RadioAstronomySoftwareGroup)

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