[Snyk] Security upgrade gatsby from 2.18.12 to 4.0.0#564

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-ca2d151160ea895c224d4360a547e976

+8,304-7,765

Commits on Jan 26, 2022

fix: starters/default/package.json & starters/default/package-lock.json to reduce vulnerabilities
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