Bump tsdown from 0.17.2 to 0.18.0

Bumps [tsdown](https://github.com/rolldown/tsdown) from 0.17.2 to 0.18.0.
- [Release notes](https://github.com/rolldown/tsdown/releases)
- [Commits](rolldown/tsdown@v0.17.2...v0.18.0)

---
updated-dependencies:
- dependency-name: tsdown
  dependency-version: 0.18.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -48,7 +48,7 @@
     "eslint": "^9.39.1",
     "fastify": "^5.6.2",
     "prettier": "^3.6.2",
-    "tsdown": "^0.17.2",
+    "tsdown": "^0.18.0",
     "typescript": "^5.1.3",
     "vitest": "^4.0.10"
   }