ci: add npm publish workflow

[wagerfield]

Resolves #468

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	100% / 100%	100 / 100
🟢	Statements	100% / 100%	100 / 100
🟢	Functions	100% / 100%	2 / 2
🟢	Branches	100% / 100%	23 / 23

File Coverage

No changed files found.

Generated in workflow #14

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (dff911e) 100.00% compared to head (893eb52) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #469   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          104       100    -4     
  Branches        14        14           
=========================================
- Hits           104       100    -4     

Files Changed	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)
src/types.ts	100.00% <100.00%> (ø)

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