test on python 3.11

[orbeckst]

• close #267
• update setup.py metadata
• add Python 3.11 to test matrix
• only test lowest (3.8) and highest (3.11) python for the expensive Windows and macOS runners to reduce CI load and wait times.
• use Python 3.10 for deploy environment

[codecov[bot]]

Codecov Report

Merging #269 (88e5de7) into master (6b51c81) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #269   +/-   ##
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  Coverage   98.69%   98.69%           
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  Files          26       26           
  Lines        1759     1759           
  Branches      363      378   +15     
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  Hits         1736     1736           
  Misses          3        3           
  Partials       20       20           

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[orbeckst]

Python 3.11 fails because there's no pymbar 3.1 LTS package available for Python 3.11 https://github.com/conda-forge/pymbar-feedstock/issues/26

[orbeckst]

pymbar LTS 3.1 packages for 3.11 are now available and tests pass — should be good to go!