Test CI on Python 3.11 beta

[dstansby]

See #297 - hopefully this will confirm or not whether building reproject works on Python 3.11

[astrofrog]

@dstansby could you rebase this and update it to use rc1?

[Cadair]

Well we have a "real" error now, but it's inside compiling pyyaml 🤦

[Cadair]

Once astropy/astropy#13614 is merged we should be able to come back to this.

[Cadair]

I have had to exclude sunpy from the test deps as aiohttp wont build on 3.11 yet.

[astrofrog]

The wheel builds now include Python 3.11, which is failing with the same error that aiohttp had: aio-libs/aiohttp#6600

[codecov]

Codecov Report

Merging #298 (0ed1a18) into main (185351b) will decrease coverage by 2.86%.
The diff coverage is n/a.

❗ Current head 0ed1a18 differs from pull request most recent head 3193ccf. Consider uploading reports for the commit 3193ccf to get more accurate results

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
- Coverage   95.13%   92.27%   -2.87%     
==========================================
  Files          23       23              
  Lines         699      699              
==========================================
- Hits          665      645      -20     
- Misses         34       54      +20     

Impacted Files	Coverage Δ
reproject/mosaicking/wcs_helpers.py	80.30% <0.00%> (-19.70%)	⬇️
reproject/mosaicking/coadd.py	84.84% <0.00%> (-7.58%)	⬇️
reproject/spherical_intersect/core.py	95.65% <0.00%> (-1.45%)	⬇️
reproject/utils.py	87.07% <0.00%> (-0.69%)	⬇️

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