[Snyk] Security upgrade yarn from 1.9.4 to 1.22.0#126

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-4c0b3317a91c922f1353c3bb464b84b6

+5-4

Commits on Feb 15, 2020

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