Fixed MyPy

[RobertoRoos]

Resolves #85

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.19%. Comparing base (de7c367) to head (2bf228b).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   50.15%   50.19%   +0.03%     
==========================================
  Files          18       18              
  Lines        1288     1289       +1     
  Branches      262      262              
==========================================
+ Hits          646      647       +1     
  Misses        598      598              
  Partials       44       44              

Flag	Coverage Δ
unittests	49.96% <100.00%> (+0.03%)	⬆️

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