use engine.io-client.java 0.2.0

src/main/java/com/github/nkzawa/socketio/client/Manager.java

@@ -480,17 +480,5 @@ public class Manager extends Emitter {
         Engine(URI uri, Options opts) {
             super(uri, opts);
         }
-
-        @Override
-        public void onopen() {}
-
-        @Override
-        public void onmessage(String s) {}
-
-        @Override
-        public void onclose() {}
-
-        @Override
-        public void onerror(Exception err) {}
     }
 }

src/test/resources/package.json

@@ -3,7 +3,6 @@
   "version": "0.0.0",
   "private": true,
   "dependencies": {
-    "socket.io": "LearnBoost/socket.io",
-    "engine.io-parser": "nkzawa/engine.io-parser#patch-0"
+    "socket.io": "1.0.0-pre2"
   }
 }