Bump stylelint from 13.11.0 to 13.12.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.11.0 to 13.12.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](stylelint/stylelint@13.11.0...13.12.0)

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

package.json

@@ -66,7 +66,7 @@
     "gulp-sourcemaps": "^3.0.0",
     "gulp-svgmin": "^3.0.0",
     "gulp-terser-js": "^5.2.2",
-    "stylelint": "^13.11.0",
+    "stylelint": "^13.12.0",
     "stylelint-config-recommended": "^3.0.0",
     "stylelint-config-recommended-scss": "^4.2.0",
     "stylelint-scss": "^3.19.0"