[Snyk] Security upgrade npm from 6.2.0 to 6.14.6#261

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-1a9e1c0c3637fc5d96eac689450f3756

+946-589

Commits on Jul 9, 2020

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