chore(deps-dev): bump tsdown from 0.18.1 to 0.18.4

Bumps [tsdown](https://github.com/rolldown/tsdown) from 0.18.1 to 0.18.4.
- [Release notes](https://github.com/rolldown/tsdown/releases)
- [Commits](rolldown/tsdown@v0.18.1...v0.18.4)

---
updated-dependencies:
- dependency-name: tsdown
  dependency-version: 0.18.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -37,7 +37,7 @@
     "prettier": "^3.7.4",
     "semver": "^7.7.3",
     "simple-git-hooks": "^2.13.1",
-    "tsdown": "^0.18.1",
+    "tsdown": "^0.18.4",
     "tsx": "4.21.0",
     "typedoc": "^0.25.4",
     "typedoc-plugin-frontmatter": "^1.3.1",