[Snyk] Security upgrade webpack-dev-server from 3.1.14 to 4.7.3#9

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-946d9afe673ea9510c0e0306dce30e8c

+1-1

Commits on Jan 13, 2022

fix: examples/preact/package.json to reduce vulnerabilities
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