fix: switch to using a conventional commits library

[djgilcrease]

This switches to the library I created for CC that is updated to v1.0.0 of the spec

[codecov]

Codecov Report

Merging #32 (c582be8) into master (9c6b268) will decrease coverage by 2.75%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #32      +/-   ##
==========================================
- Coverage   23.34%   20.58%   -2.76%     
==========================================
  Files          16       15       -1     
  Lines         467      447      -20     
==========================================
- Hits          109       92      -17     
+ Misses        342      340       -2     
+ Partials       16       15       -1     

Impacted Files	Coverage Δ
types.go	55.55% <ø> (ø)
add.go	79.16% <100.00%> (ø)

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