[Snyk] Security upgrade lighthouse from 2.0.0 to 3.1.0#27

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-712c2628e10331a1c64821e29dfe31f9

+1-1

Commits on Jul 29, 2020

fix: scripts/bench/package.json to reduce vulnerabilities
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