cleanup commented code, golangci-lint fixes

[angaz]

Cleaned up some commented out code, and ran golangci-lint, and fixed the errors.

I also thought that generate function had a bit too many parameters, so I made a struct for the params for that function.

[codecov-commenter]

Codecov Report

Merging #70 (ded6a10) into master (71d3edd) will decrease coverage by 0.20%.
The diff coverage is 62.22%.

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
- Coverage   66.23%   66.02%   -0.21%     
==========================================
  Files           4        4              
  Lines         465      471       +6     
==========================================
+ Hits          308      311       +3     
- Misses        146      149       +3     
  Partials       11       11              

Impacted Files	Coverage Δ
stringer.go	60.88% <62.22%> (-0.17%)	⬇️

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[dmarkham]

This is for sure better