Bump stylelint from 13.11.0 to 13.12.0 (#564)

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)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -27,7 +27,7 @@
     "postcss-loader": "5.1.0",
     "sass": "1.32.8",
     "sass-loader": "11.0.1",
-    "stylelint": "13.11.0",
+    "stylelint": "13.12.0",
     "stylelint-order": "4.1.0",
     "stylelint-scss": "3.19.0",
     "stylelint-webpack-plugin": "2.1.1",