feat: optimize JS assets added later by plugins

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

optimize assets added lately

Breaking Changes

Hope, no

Additional Info

No

[codecov]

Codecov Report

Merging #373 (3961b6a) into master (e10b8b4) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #373      +/-   ##
==========================================
+ Coverage   96.96%   97.00%   +0.03%     
==========================================
  Files           3        3              
  Lines         297      300       +3     
  Branches      126      128       +2     
==========================================
+ Hits          288      291       +3     
  Misses          8        8              
  Partials        1        1              

Impacted Files	Coverage Δ
src/index.js	97.60% <100.00%> (+0.03%)	⬆️

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