chore(deps): bump @fastify/deepmerge from 1.3.0 to 2.0.0 (#529)

Bumps [@fastify/deepmerge](https://github.com/fastify/deepmerge) from 1.3.0 to 2.0.0.
- [Release notes](https://github.com/fastify/deepmerge/releases)
- [Commits](fastify/deepmerge@v1.3.0...v2.0.0)

---
updated-dependencies:
- dependency-name: "@fastify/deepmerge"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -7,7 +7,7 @@
   "types": "types/index.d.ts",
   "dependencies": {
     "@fastify/busboy": "^2.1.0",
-    "@fastify/deepmerge": "^1.0.0",
+    "@fastify/deepmerge": "^2.0.0",
     "@fastify/error": "^3.0.0",
     "fastify-plugin": "^4.0.0",
     "secure-json-parse": "^2.4.0",