fix: support esm format for configurations

[alexander-akait]

What kind of change does this PR introduce?

bugfix

Did you add tests for your changes?

yes

If relevant, did you update the documentation?

Yep

Summary

fixes #1622

Does this PR introduce a breaking change?

No

Other information

No

[alexander-akait]

Something has global side effects, it breaks our tests...

[alexander-akait]

I hate our tests for init and other generators, it is unstable on 100%, we need fully rewrite them

[codecov]

Codecov Report

Merging #2381 (0fa244b) into master (9d6dbda) will increase coverage by 0.47%.
The diff coverage is 92.59%.

@@            Coverage Diff             @@
##           master    #2381      +/-   ##
==========================================
+ Coverage   71.26%   71.74%   +0.47%     
==========================================
  Files          46       47       +1     
  Lines        2158     2173      +15     
  Branches      570      573       +3     
==========================================
+ Hits         1538     1559      +21     
+ Misses        620      614       -6     

Impacted Files	Coverage Δ
packages/webpack-cli/bin/cli.js	50.00% <75.00%> (+5.55%)	⬆️
...ges/webpack-cli/lib/utils/dynamic-import-loader.js	83.33% <83.33%> (ø)
packages/webpack-cli/lib/bootstrap.js	100.00% <100.00%> (ø)
packages/webpack-cli/lib/utils/index.js	84.00% <100.00%> (+1.39%)	⬆️
packages/webpack-cli/lib/webpack-cli.js	91.88% <100.00%> (+0.80%)	⬆️
...kages/generators/src/utils/modify-config-helper.ts	57.14% <0.00%> (-0.76%)	⬇️
packages/init/src/index.ts	88.88% <0.00%> (ø)
packages/generators/src/utils/scaffold.ts	77.55% <0.00%> (+1.08%)	⬆️

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[alexander-akait]

Found the problem, somebody install @babel/core in out tests so, recoil try to use it, also we need test for this I think

[alexander-akait]

I hate nyc, it wrap require and can't provide option to disable it for specific lines, so it return invalid cde and I can't find how we can test it