Bump grunt-stylelint from 0.15.0 to 0.16.0

Bumps [grunt-stylelint](https://github.com/wikimedia/grunt-stylelint) from 0.15.0 to 0.16.0.
- [Release notes](https://github.com/wikimedia/grunt-stylelint/releases)
- [Changelog](https://github.com/wikimedia/grunt-stylelint/blob/master/History.md)
- [Commits](wikimedia/grunt-stylelint@v0.15.0...v0.16.0)

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

Author: dependabot[bot]

package.json

@@ -24,7 +24,7 @@
     "grunt-postcss": "0.9.0",
     "grunt-replace-regex": "1.0.3",
     "grunt-sass": "3.1.0",
-    "grunt-stylelint": "0.15.0",
+    "grunt-stylelint": "0.16.0",
     "load-grunt-tasks": "5.1.0",
     "sass": "1.29.0",
     "stylelint": "13.8.0",