[Snyk] Security upgrade node-sass from 4.9.3 to 4.13.1#22

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snyk-bot wants to merge 1 commit intov4-devfrom snyk-fix-478a1a51dbabe71452cf05655061780f

+321-130

Commits on Oct 13, 2020

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