implement floyd-warshall shortest path

[hmdsefi]

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[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (2f25b96) 99.03% compared to head (74fc6b1) 98.14%.
Report is 31 commits behind head on master.

Files	Patch %	Lines
path/floyd_warshall.go	77.50%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   99.03%   98.14%   -0.89%     
==========================================
  Files          16       17       +1     
  Lines         929      969      +40     
==========================================
+ Hits          920      951      +31     
- Misses          6       12       +6     
- Partials        3        6       +3     

Flag	Coverage Δ
unittests	98.14% <77.50%> (-0.89%)	⬇️

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