fix: upgrade fastify from 4.17.0 to 4.18.0 (#263)

Snyk has created this PR to upgrade fastify from 4.17.0 to 4.18.0.

See this package in npm:
https://www.npmjs.com/package/fastify

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/53f94480-e7ae-41d2-985c-270fae345664?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>