build(deps): bump selfsigned from 5.2.0 to 5.4.0

Bumps [selfsigned](https://github.com/jfromaniello/selfsigned) from 5.2.0 to 5.4.0.
- [Changelog](https://github.com/jfromaniello/selfsigned/blob/master/CHANGELOG.md)
- [Commits](jfromaniello/selfsigned@v5.2.0...v5.4.0)

---
updated-dependencies:
- dependency-name: selfsigned
  dependency-version: 5.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -51,7 +51,7 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.25.1",
-    "selfsigned": "^5.2.0",
+    "selfsigned": "^5.4.0",
     "swagger-ui-dist": "^5.31.0",
     "ws": "^8.18.3"
   },