Bump slug from 4.1.0 to 9.0.0

Bumps [slug](https://github.com/Trott/slug) from 4.1.0 to 9.0.0.
- [Changelog](https://github.com/Trott/slug/blob/main/CHANGELOG.md)
- [Commits](Trott/slug@v4.1.0...v9.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -30,7 +30,7 @@
     "noflo-runtime-websocket": "^0.13.0",
     "open": "^8.0.1",
     "password-generator": "^2.2.0",
-    "slug": "^4.0.2",
+    "slug": "^9.0.0",
     "uuid": "^8.1.0"
   },
   "devDependencies": {