Bump slug from 0.9.4 to 3.5.0

Bumps [slug](https://github.com/Trott/slug) from 0.9.4 to 3.5.0.
- [Release notes](https://github.com/Trott/slug/releases)
- [Changelog](https://github.com/Trott/slug/blob/master/CHANGELOG)
- [Commits](Trott/slug@v0.9.4...v3.5.0)

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

package.json

@@ -77,7 +77,7 @@
     "marked": "^0.7.0",
     "mustache": "^2.2.1",
     "request": "^2.88.0",
-    "slug": "^0.9.1",
+    "slug": "^3.5.0",
     "striptags": "^3.1.1",
     "word-wrap": "^1.2.1"
   },