[Snyk] Security upgrade web-ext from 4.3.0 to 6.0.0#19

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-553f9446fc0326aa6a1fb0b85f023e76

+2-2

Commits on Jul 28, 2021

fix: packages/react-devtools-extensions/package.json to reduce vulnerabilities
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