chore(deps-dev): bump slug from 5.0.1 to 5.1.0

Bumps [slug](https://github.com/Trott/slug) from 5.0.1 to 5.1.0.
- [Release notes](https://github.com/Trott/slug/releases)
- [Changelog](https://github.com/Trott/slug/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Trott/slug/compare/v5.0.1...v5.1.0)

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

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

package.json

@@ -42,7 +42,7 @@
     "p-map": "^4.0.0",
     "postcss": "^7.0.35",
     "prettier": "^2.3.1",
-    "slug": "^5.0.1",
+    "slug": "^5.1.0",
     "standard-version": "^9.3.0",
     "stylelint": "^13.13.1",
     "stylelint-config-prettier": "^8.0.2",