🐛 Fix Contours with Holes

[measty]

This PR fixes the problem of dict_to_store_semantic_segmentor failing to handle holes properly. The problem was, that the code was not associating the holes with the correct parent contour.

For a segmentation mask like:

Old code would give an annotation store looking like:

With this PR, that store now looks like:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.09%. Comparing base (3fa051f) to head (33dc025).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #956   +/-   ##
========================================
  Coverage    99.09%   99.09%           
========================================
  Files           71       71           
  Lines         9161     9161           
  Branches      1196     1196           
========================================
  Hits          9078     9078           
  Misses          59       59           
  Partials        24       24           

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[shaneahmed]

Thanks @measty