After pusher-js 6 forceTLS is default true

As now since pusher-js 6 the encrypted attribute was removed in favor of forceTLS and it is true by default, so we need to use forceTLS: false, to avoid CORS issues.

docs/basic-usage/pusher.md

@@ -111,6 +111,7 @@ window.Echo = new Echo({
     key: 'your-pusher-key',
     wsHost: window.location.hostname,
     wsPort: 6001,
+    forceTLS: false,
     disableStats: true,
 });
 ```