Implement React example of WS integration with Flipper

Summary: Create an example of how one can use `js-flipper` in a browser to connect to Flipper over WS.

Reviewed By: mweststrate

Differential Revision: D31688114

fbshipit-source-id: 135f826daeddeda8dca5b3df6504cc2bdc04dd1b

js/js-flipper/src/index.ts

@@ -7,10 +7,9 @@
  * @format
  */
 
-import {FlipperClient, FlipperWebSocket, WSCloseCode} from './client';
-import {FlipperPlugin} from './plugin';
+import {FlipperClient} from './client';
 
+export * from './client';
 export * from './plugin';
-export {FlipperWebSocket};
 
 export const flipperClient = new FlipperClient();