[Snyk] Security upgrade exceljs from 0.2.7 to 0.3.1#3

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-acde87a9eaadf103da4f4e3f9dffdcbc

+1-1

Commits on Aug 17, 2020

fix: test/regression/package.json to reduce vulnerabilities
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