Move fixes to filter_min_distance and 2d coordinate interpolation to v1.4.

[w-k-jones]

This PR takes the same changes made in #244 and #250 and re-implements them on v1.4 to allow for a hotfix release. The logic tree in filter_min_distance has been simplified based on the suggestion of @lettlini in the review of #244

Note that filter_min_distance is not tested as comprehensively due to the missing tests that are implemented for v1.5

Hopefully this won't create merge conflicts for v1.5...

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[codecov]

Codecov Report

Base: 35.76% // Head: 39.37% // Increases project coverage by +3.61% 🎉

Coverage data is based on head (8dcb567) compared to base (09b176b).
Patch coverage: 66.66% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           hotfix     #251      +/-   ##
==========================================
+ Coverage   35.76%   39.37%   +3.61%     
==========================================
  Files          15       11       -4     
  Lines        3403     2255    -1148     
==========================================
- Hits         1217      888     -329     
+ Misses       2186     1367     -819     

Flag	Coverage Δ
unittests	39.37% <66.66%> (+3.61%)	⬆️

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

Impacted Files	Coverage Δ
tobac/utils.py	48.28% <50.00%> (ø)
tobac/feature_detection.py	80.52% <69.23%> (+0.76%)	⬆️
tobac/tracking.py	65.45% <0.00%> (-3.34%)	⬇️
tobac/centerofgravity.py	6.25% <0.00%> (-1.22%)	⬇️
tobac/analysis.py	7.91% <0.00%> (-0.60%)	⬇️
tobac/wrapper.py	6.77% <0.00%> (-0.16%)	⬇️
tobac/utils/mask.py
tobac/utils/internal.py
tobac/utils/general.py
tobac/utils/__init__.py
... and 2 more

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[JuliaKukulies]

Great that you managed to get these changes over to the hotfix branch @w-k-jones! Looks all good to me and hopefully, it will be as easy to merge back into v1.5

[freemansw1]

I'm happy for this to be merged. Sorry that I missed approving this.

[w-k-jones]

I'm happy for this to be merged. Sorry that I missed approving this.

No worries! I'll go merge now