[Snyk] Security upgrade chart.js from 2.7.2 to 2.9.4#16

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-b3434858b61fb089616e3c1672fc12b3

+21-18

Commits on Oct 19, 2020

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