[initial] Gosentiwordnet v2 release

[dinopuguh]

• Add unit test
• Fix several bugs
• Update readme
• Add example code

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@9db2044). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #1   +/-   ##
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  Coverage          ?   93.93%           
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  Files             ?        1           
  Lines             ?       33           
  Branches          ?        0           
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  Hits              ?       31           
  Misses            ?        1           
  Partials          ?        1           

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