Add dtw

[takenori-y]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.57%. Comparing base (39c68a5) to head (739bc1b).
⚠️ Report is 10 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master     #148    +/-   ##
========================================
  Coverage   99.56%   99.57%            
========================================
  Files         257      259     +2     
  Lines        9239     9396   +157     
========================================
+ Hits         9199     9356   +157     
  Misses         40       40            

Flag	Coverage Δ
unittests	99.57% <100.00%> (+<0.01%)	⬆️

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