Add python 3.10 support

[aaronkollasch]

No description provided.

[codecov]

Codecov Report

Merging #21 (d7fa090) into main (1c8d364) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #21   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines         1226      1230    +4     
  Branches       217       226    +9     
=========================================
+ Hits          1226      1230    +4     

Impacted Files	Coverage Δ
src/photomanager/actions/fileops.py	100.00% <100.00%> (ø)
src/photomanager/database.py	100.00% <0.00%> (ø)
src/photomanager/async_base.py	100.00% <0.00%> (ø)
src/photomanager/pyexiftool/pyexiftool.py	100.00% <0.00%> (ø)
src/photomanager/pyexiftool/pyexiftool_async.py	100.00% <0.00%> (ø)

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