[Snyk] Security upgrade webpack-dev-server from 3.11.2 to 4.0.0#30

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-ca79b038de948b2e326f5b089b11f60d

+1-1

Commits on Sep 13, 2021

fix: examples/browser-service-worker/package.json to reduce vulnerabilities
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