[Snyk] Security upgrade webpack-cli from 3.3.12 to 4.0.0#6

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snyk-bot wants to merge 1 commit intomainfrom snyk-fix-4e035c8f81274a581c413d68e900c0f3

+2,545-393

Commits on Sep 15, 2021

fix: package.json & package-lock.json to reduce vulnerabilities
snyk-bot
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