[Snyk] Security upgrade nyc from 11.4.1 to 15.0.0#40

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-b611d4218d3f713695909347b93986e5

+1,658-4,702

Commits on Mar 30, 2021

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