chore(deps-dev): bump @types/node from 14.14.42 to 15.0.0 (#410)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 14.14.42 to 15.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Signed-off-by: dependabot[bot] <support@github.com>

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

package.json

@@ -35,7 +35,7 @@
   },
   "homepage": "https://github.com/fastify/fastify-swagger#readme",
   "devDependencies": {
-    "@types/node": "^14.14.6",
+    "@types/node": "^15.0.0",
     "fastify": "^3.7.0",
     "fastify-helmet": "^5.0.3",
     "fs-extra": "^9.0.0",