Yaml is a superset of json.

[ioggstream]

This PR

replaces a custom function with yaml.safe_load

Because

yaml is a superset of json

[codecov-commenter]

Codecov Report

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@@            Coverage Diff            @@
##             master      #23   +/-   ##
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  Coverage          ?   93.38%           
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  Files             ?        2           
  Lines             ?      272           
  Branches          ?        0           
=========================================
  Hits              ?      254           
  Misses            ?       18           
  Partials          ?        0           

Flag	Coverage Δ
#unittests	93.38% <0.00%> (?)

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[koxudaxi]

@ioggstream
Great!!
I have released a version as 0.0.13

Thank you very much.