fix: compatible with window (apache-superset#426)

Author: gdutwyg

packages/superset-ui-plugins-demo/package.json

@@ -10,7 +10,7 @@
     "demo:publish": "gh-pages -d _gh-pages",
     "deploy-demo": "npm run demo:clean && npm run demo:build && npm run demo:publish && npm run demo:clean",
     "storybook:run": "start-storybook -p 9001",
-    "storybook": "cd ../../ && yarn build && cd - && yarn storybook:run"
+    "storybook": "cd ../../ && yarn build && cd ./packages/superset-ui-plugins-demo && yarn storybook:run"
   },
   "repository": {
     "type": "git",
@@ -60,4 +60,4 @@
     "@superset-ui/time-format": "^0.12.0",
     "@superset-ui/translation": "^0.12.0"
   }
-}
+}