message: Mark Vue support as in beta
diff: @@ -62,7 +62,7 @@ const items = {
  'Config': '/docs/react/config',
  'Platform Utils': '/docs/react/platform'
  },
  - 'Vue': {
  + 'Vue (Beta)': {
  'Overview': '/docs/vue/overview',
  'Build Your First App': '/docs/vue/your-first-app',
  'Lifecycle': '/docs/vue/lifecycle',
  