[Snyk] Security upgrade webpack-dev-server from 3.7.2 to 4.0.0#77

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snyk-bot wants to merge 1 commit intodevelopfrom snyk-fix-effa0274ec06f0aae31520cfc969d908

+1-1

Commits on Sep 12, 2021

fix: cvat-canvas/package.json to reduce vulnerabilities
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