chore(deps-dev): bump stylelint from 13.13.1 to 15.10.1

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.13.1 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@13.13.1...15.10.1)

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

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

package.json

@@ -79,7 +79,7 @@
     "react-dom": "^16.9.0",
     "react-markdown": "^4.3.1",
     "source-map-support": "^0.5.16",
-    "stylelint": "^13.7.2",
+    "stylelint": "^15.10.1",
     "ts-node": "^8.6.2",
     "tsconfig-paths": "^3.9.0",
     "typescript": "^3.5.2",