[Snyk] Security upgrade gatsby from 2.24.47 to 3.13.0#186

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-0f580d8777c98541b297b4f3f7c64510

+9,517-5,211

Commits on Sep 1, 2021

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