build(deps-dev): Bump eslint-config-prettier from 6.8.0 to 6.9.0

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.8.0 to 6.9.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v6.8.0...v6.9.0)

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

package.json

@@ -22,7 +22,7 @@
     "concurrently": "^5.0.0",
     "cross-env": "^6.0.0",
     "eslint": "~6.8.0",
-    "eslint-config-prettier": "~6.8.0",
+    "eslint-config-prettier": "~6.9.0",
     "eslint-plugin-import": "~2.19.1",
     "eslint-plugin-prettier": "~3.1.1",
     "execa": "^3.2.0",