build(deps): update @types/storybook__react requirement (#205)

Updates the requirements on [@types/storybook__react](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/storybook__react) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/storybook__react)

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

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

@@ -38,7 +38,7 @@
     "@storybook/addons": "^5.0.9",
     "@storybook/react": "^5.0.9",
     "@types/react": "^16.8.8",
-    "@types/storybook__react": "3.0.7",
+    "@types/storybook__react": "4.0.2",
     "bootstrap": "^4.3.1",
     "react": "^16.6.0",
     "storybook-addon-jsx": "^7.1.0"