chore(deps-dev): bump fastify from 3.18.1 to 3.29.4

Bumps [fastify](https://github.com/fastify/fastify) from 3.18.1 to 3.29.4.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v3.18.1...v3.29.4)

---
updated-dependencies:
- dependency-name: fastify
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -68,7 +68,7 @@
         "aws-sdk-mock": "^5.4.0",
         "cookie-parser": "^1.4.5",
         "express": "^4.18.2",
-        "fastify": "3.18.1",
+        "fastify": "3.29.4",
         "glob": "7.1.7",
         "koa": "^2.13.3",
         "lambda-tester": "^4.0.1",