Expose rel label for Python and Node.js API

[mewim]

No description provided.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a135ab1) 90.22% compared to head (35b64b9) 90.22%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2060   +/-   ##
=======================================
  Coverage   90.22%   90.22%           
=======================================
  Files         950      950           
  Lines       33764    33766    +2     
=======================================
+ Hits        30462    30464    +2     
  Misses       3302     3302           

Files Changed	Coverage Δ
tools/nodejs_api/src_cpp/node_util.cpp	94.11% <100.00%> (+0.04%)	⬆️
tools/python_api/src_cpp/py_query_result.cpp	96.17% <100.00%> (+0.02%)	⬆️

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