[Snyk] Security upgrade react-scripts from 3.4.0 to 4.0.0#21

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-b142c37705708862bf1f9d2301fb59b4

+7,310-4,451

Commits on Apr 14, 2021

fix: frontend/package.json & frontend/package-lock.json to reduce vulnerabilities
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