[Snyk] Security upgrade webpack from 2.6.1 to 4.0.0#193

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-68d77c352f00d7e7a40a66d7aa547a66

+2,803-571

Commits on Mar 31, 2021

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