errors: captures error message fields in struct

[santhosh-tekuri]

closes Issue #44

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 96.96970% with 2 lines in your changes missing coverage. Please review.

Project coverage is 91.61%. Comparing base (2dc9222) to head (e8eeadf).
Report is 49 commits behind head on master.

Files with missing lines	Patch %	Lines
output.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #99      +/-   ##
==========================================
- Coverage   91.66%   91.61%   -0.06%     
==========================================
  Files          10       10              
  Lines        2545     2527      -18     
==========================================
- Hits         2333     2315      -18     
  Misses        164      164              
  Partials       48       48              

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[akshetpandey]

@santhosh-tekuri : What is needed to land this diff? I can help.

[santhosh-tekuri]

@akshetpandey
you can use v6.0.0-alpha.1 if you need this change.

currently I am porting this to rust https://github.com/santhosh-tekuri/boon and found some bugs and some improvements which also require incompatible changes.

so I am holding on so that I can do all incompatible changes in single major release.