fix: compatibility with webpack@4 and webpack@5 for monorepos

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

fixes #600

Breaking Changes

No

Additional Info

hard to tests

[codecov]

Codecov Report

Merging #636 into master will decrease coverage by 0.15%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #636      +/-   ##
==========================================
- Coverage   89.53%   89.37%   -0.16%     
==========================================
  Files          11       11              
  Lines         640      640              
  Branches      169      170       +1     
==========================================
- Hits          573      572       -1     
- Misses         64       65       +1     
  Partials        3        3              

Impacted Files	Coverage Δ
src/index.js	91.10% <60.00%> (-0.43%)	⬇️
src/loader.js	91.89% <100.00%> (ø)

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