Improved typing and tests

[david-zwicker]

No description provided.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (856cd97) 90.13% compared to head (a2386b0) 90.61%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
+ Coverage   90.13%   90.61%   +0.48%     
==========================================
  Files           8        7       -1     
  Lines        1734     1727       -7     
==========================================
+ Hits         1563     1565       +2     
+ Misses        171      162       -9     

Flag	Coverage Δ
unittests	90.61% <96.87%> (+0.48%)	⬆️

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Files	Coverage Δ
droplets/emulsions.py	89.85% <ø> (ø)
droplets/image_analysis.py	90.68% <100.00%> (ø)
droplets/trackers.py	91.52% <100.00%> (ø)
droplets/droplets.py	93.03% <96.66%> (+0.20%)	⬆️

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