[Snyk] Security upgrade metalsmith from 2.3.0 to 2.5.0#39

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-6b962a125fa160081c1c6cef948780d5

+107-185

Commits on Jun 10, 2022

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