[Snyk] Security upgrade mkdirp from 0.5.1 to 1.0.0#4

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-975950db28c6063960e90237f709c758

+188-34

Commits on Mar 17, 2020

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