Support Python 3.7 and 3.8

[kitsuyui]

No description provided.

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 99.55% // Decreases project coverage by -0.45% ⚠️

Coverage data is based on head (cd385ab) compared to base (77aa07b).
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #19      +/-   ##
===========================================
- Coverage   100.00%   99.55%   -0.45%     
===========================================
  Files            2        2              
  Lines          222      226       +4     
===========================================
+ Hits           222      225       +3     
- Misses           0        1       +1     

Flag	Coverage Δ
unittests	99.55% <80.00%> (-0.45%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
richset/__init__.py	100.00% <ø> (ø)
richset/comparable.py	85.71% <80.00%> (-14.29%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.