[Snyk] Security upgrade react-scripts from 3.3.0 to 3.4.3#66

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-eef22246256ed6c0e14a26a0605779da

+2,954-916

Commits on Aug 13, 2020

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