TST: Enable tests for Python 3.10

[BvB93]

No description provided.

[codecov]

Codecov Report

Merging #64 (95c13d0) into master (a83611a) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #64      +/-   ##
==========================================
+ Coverage   85.18%   85.20%   +0.01%     
==========================================
  Files          14       14              
  Lines        1485     1487       +2     
  Branches      244      254      +10     
==========================================
+ Hits         1265     1267       +2     
+ Misses        153      152       -1     
- Partials       67       68       +1     

Impacted Files	Coverage Δ
dataCAT/pdb_array.py	91.06% <100.00%> (ø)
dataCAT/property_dset.py	80.64% <100.00%> (ø)
dataCAT/database.py	71.92% <0.00%> (+0.17%)	⬆️

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