[Snyk] Security upgrade nyc from 14.0.0 to 15.0.0#4

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-b2918ca6bf9c95f79b9ef7e4e0686a8d

+799-467

Commits on Jan 6, 2022

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