[Snyk] Security upgrade metalsmith from 2.3.0 to 2.5.0#34

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Qdigital wants to merge 1 commit intomasterfrom snyk-fix-327112ba2f27ecdbe39742d5658ddb3d

+170-178

Commits on Jun 11, 2022

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