refactor: commonjs options

[cap-Bernardito]

This PR contains a:

• [ ] bugfix
• [ ] new feature
• [x] code refactor
• [x] test update
• [ ] typo fix
• [x] metadata update

Motivation / Use-Case

Remove options for commonjs:

• 'named' - in favor 'multiple' option,
• 'default' - in favor 'single' option,
• 'side-effect' - in favor 'pure' option

Breaking Changes

Yes

Additional Info

No

[codecov[bot]]

Codecov Report

Merging #75 into master will increase coverage by 0.73%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #75      +/-   ##
==========================================
+ Coverage   95.04%   95.77%   +0.73%     
==========================================
  Files           3        3              
  Lines         121      142      +21     
  Branches       47       48       +1     
==========================================
+ Hits          115      136      +21     
  Misses          6        6              

Impacted Files	Coverage Δ
src/utils.js	100.00% <100.00%> (ø)

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