[Snyk] Security upgrade react-scripts from 4.0.3 to 5.0.0#12

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-ae6d96339c73fb91cb3113186cc8f645

Commits on Dec 15, 2021

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