chore(deps): update dependency stylelint-config-prettier to v8 (#1627)

Author: renovate[bot]

package.json

@@ -147,7 +147,7 @@
         "semver": "^7.0.0",
         "style-loader": "^0.23.0",
         "stylelint": "^12.0.0",
-        "stylelint-config-prettier": "^4.0.0",
+        "stylelint-config-prettier": "^8.0.0",
         "stylelint-config-standard": "^19.0.0",
         "through2": "^3.0.0",
         "uglifyjs-webpack-plugin": "^2.1.1",