Enable flutter realtime tests

Author: abnegate

tests/languages/flutter/tests.dart

@@ -32,7 +32,7 @@ void main() async {
       "wss://demo.appwrite.io/v1"); // change this later to appwrite.io
 
   Realtime realtime = Realtime(client);
-  // final rtsub = realtime.subscribe(["tests"]);
+   final rtsub = realtime.subscribe(["tests"]);
 
   await Future.delayed(Duration(seconds: 5));
   client.addHeader('Origin', 'http://localhost');
@@ -123,10 +123,10 @@ void main() async {
     print(e.message);
   }
 
-  // rtsub.stream.listen((message) {
-  //   print(message.payload["response"]);
-  //   rtsub.close();
-  // });
+  rtsub.stream.listen((message) {
+    print(message.payload["response"]);
+    rtsub.close();
+  });
 
   await Future.delayed(Duration(seconds: 5));