feat: upgrade fastify from 3.29.0 to 4.0.0 (#599)

Snyk has created this PR to upgrade fastify from 3.29.0 to 4.0.0.

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

See this project in Snyk:
https://app.snyk.io/org/lukemnet/project/aa1d5c91-7f19-4200-a8df-fe02e0414279?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -42,7 +42,7 @@
     "eslint": "8.17.0",
     "eslint-config-airbnb-typescript-prettier": "5.0.0",
     "eslint-plugin-jest": "26.5.3",
-    "fastify": "3.29.0",
+    "fastify": "4.0.0",
     "fastify-blipp": "3.1.0",
     "fastify-caching": "6.3.0",
     "fastify-env": "2.2.0",