use dropbox in bundled example

examples/bundled-example/main.js

@@ -1,6 +1,7 @@
 const Uppy = require('./../../packages/@uppy/core/src')
 const Dashboard = require('./../../packages/@uppy/dashboard/src')
 const Instagram = require('./../../packages/@uppy/instagram/src')
+const Dropbox = require('./../../packages/@uppy/dropbox/src')
 const GoogleDrive = require('./../../packages/@uppy/google-drive/src')
 const Url = require('./../../packages/@uppy/url/src')
 const Webcam = require('./../../packages/@uppy/webcam/src')
@@ -30,6 +31,7 @@ const uppy = Uppy({
   })
   .use(GoogleDrive, { target: Dashboard, serverUrl: 'http://localhost:3020' })
   .use(Instagram, { target: Dashboard, serverUrl: 'http://localhost:3020' })
+  .use(Dropbox, { target: Dashboard, serverUrl: 'http://localhost:3020' })
   .use(Url, { target: Dashboard, serverUrl: 'http://localhost:3020' })
   .use(Webcam, { target: Dashboard })
   .use(Tus, { endpoint: TUS_ENDPOINT })