[Snyk] Security upgrade @storybook/core from 3.4.12 to 4.0.0#187

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-4c271fafe1c8c567986658e5fb9b9311

+1-1

Commits on Dec 31, 2020

fix: app/angular/package.json to reduce vulnerabilities
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