chore: update webpack-merge

[alexander-akait]

What kind of change does this PR introduce?

chore

Did you add tests for your changes?

Existing

If relevant, did you update the documentation?

No

Summary

update webpack-merge

Does this PR introduce a breaking change?

No

Other information

No

[codecov]

Codecov Report

Merging #2348 (11aab23) into master (9b39f1e) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2348   +/-   ##
=======================================
  Coverage   68.19%   68.19%           
=======================================
  Files          50       50           
  Lines        2053     2053           
  Branches      509      509           
=======================================
  Hits         1400     1400           
  Misses        653      653           

Impacted Files	Coverage Δ
packages/webpack-cli/lib/webpack-cli.js	89.86% <100.00%> (ø)

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