Bump stylelint from 13.3.3 to 13.4.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.3.3 to 13.4.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stylelint/stylelint/compare/13.3.3...13.4.0)

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

package.json

@@ -42,7 +42,7 @@
     "postcss-loader": "^3.0.0",
     "postcss-preset-env": "^6.7.0",
     "style-loader": "^1.1.3",
-    "stylelint": "^13.3.3",
+    "stylelint": "^13.4.0",
     "stylelint-config-rational-order": "^0.1.2",
     "stylelint-no-browser-hacks": "^1.2.1",
     "stylelint-order": "^4.0.0",