build(deps-dev): bump stylelint from 9.10.1 to 15.10.1

Bumps [stylelint](https://github.com/stylelint/stylelint) from 9.10.1 to 15.10.1.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@9.10.1...15.10.1)

---
updated-dependencies:
- dependency-name: stylelint
  dependency-type: direct:development
...

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

package.json

@@ -65,7 +65,7 @@
     "node-sass": "4.14.1",
     "prettier": "^1.16.4",
     "sass-loader": "^7.1.0",
-    "stylelint": "^9.10.1",
+    "stylelint": "^15.10.1",
     "stylelint-config-standard": "^18.2.0",
     "stylelint-scss": "^3.5.4",
     "stylelint-webpack-plugin": "^0.10.5",