[Snyk] Security upgrade gatsby from 2.18.12 to 3.13.0#34

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-015aee516bbd58cc197be3434f9b81d5

+12,977-9,135

Commits on Aug 31, 2021

fix: starters/gatsby-starter-blog-theme/package.json & starters/gatsby-starter-blog-theme/package-lock.json to reduce vulnerabilities
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