[Snyk] Security upgrade webpack-dev-server from 3.11.2 to 4.0.0#75

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-fdddcb8f06c4e6228314a0e1ac6a3232

Commits on Aug 19, 2021

fix: packages/react-devtools-extensions/package.json to reduce vulnerabilities
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