chore(deps): update webpack to 4.39.0

[hiroppy]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

no

Motivation / Use-Case

fixes: #2167

Breaking Changes

no

Additional Info

[codecov]

Codecov Report

Merging #2171 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2171   +/-   ##
=======================================
  Coverage   93.91%   93.91%           
=======================================
  Files          33       33           
  Lines        1265     1265           
  Branches      363      363           
=======================================
  Hits         1188     1188           
  Misses         71       71           
  Partials        6        6

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[alexander-akait]

Good work, feel free to merge after CI green