build: update webpack to version 4.39.2

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
webpack	devDependencies	patch	4.39.1 -> 4.39.2
webpack	dependencies	patch	4.39.1 -> 4.39.2

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Release Notes

webpack/webpack

v4.39.2

Compare Source

Bugfixes

• fix ProfilingPlugin not ending traces correctly

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