Bump npm from 6.8.0 to 6.9.0

Bumps [npm](https://github.com/npm/cli) from 6.8.0 to 6.9.0.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/v6.9.0/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/compare/v6.8.0...v6.9.0)

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

package.json

@@ -4,6 +4,6 @@
     "build": "hugo -s exampleSite"
   },
   "dependencies": {
-    "npm": "^6.8.0"
+    "npm": "^6.9.0"
   }
 }