build(deps): bump fastify-plugin from 3.0.1 to 4.0.0 (#122)

Bumps [fastify-plugin](https://github.com/fastify/fastify-plugin) from 3.0.1 to 4.0.0.
- [Release notes](https://github.com/fastify/fastify-plugin/releases)
- [Commits](fastify/fastify-plugin@v3.0.1...v4.0.0)

---
updated-dependencies:
- dependency-name: fastify-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -43,7 +43,7 @@
     "typescript": "^4.0.2"
   },
   "dependencies": {
-    "fastify-plugin": "^3.0.0"
+    "fastify-plugin": "^4.0.0"
   },
   "types": "formbody.d.ts",
   "publishConfig": {