Fix autos

[bhazelton]

Description

Use the new fix_autos keyword in pyuvdata to fix autos to be real on file write-out (if the pyuvdata version is high enough).

Also fix some test errors associated with recent pyuvdata updates and fill in some missing recent info from the changelog.

Motivation and Context

fixes #399

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Reference simulation update or replacement
• [ ] Documentation change (documentation changes only)
• [ ] Version change
• [ ] Build or continuous integration change

Checklist:

For all pull requests:

• [x] I have read the contribution guide.
• [x] My code follows the code style of this project.

New feature checklist:

• [x] I have added or updated the docstrings associated with my feature using the numpy docstring format.
• [ ] I have updated the documentation to highlight my new feature (if appropriate).
• [x] I have added tests to cover my new feature.
• [x] All new and existing tests pass.
• [ ] I have checked that I reproduce the reference simulations or if there are differences they are explained below (if appropriate). If there are changes that are correct, I will update the reference simulation files after this PR is merged.
• [ ] I have checked (e.g., using the benchmarking tools) that this change does not significantly increase typical runtimes. If it does, I have included a justification in the comments on this PR.
• [x] I have updated the CHANGELOG.

[codecov[bot]]

Codecov Report

Merging #401 (8ba2115) into main (771e491) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #401   +/-   ##
=======================================
  Coverage   99.34%   99.34%           
=======================================
  Files          13       13           
  Lines        2126     2131    +5     
=======================================
+ Hits         2112     2117    +5     
  Misses         14       14           

Impacted Files	Coverage Δ
pyuvsim/utils.py	98.17% <100.00%> (+0.05%)	:arrow_up:

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[bhazelton]

Users who have pyuvdata < 2.2.7 may have slightly complex autos, but they won't be prevented from writing out those files. The code to check that autos were real was introduced in 2.2.7.