[Snyk] Security upgrade copy-webpack-plugin from 5.0.2 to 6.0.0#6

Open

snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-f6e2181721e9e2f6a3da2ce27e8576b9

+596-398

Commits on Jun 1, 2020

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