Don't bind arrow functions

Author: MatthijsBurgh

lib/action-server.js

@@ -26,12 +26,12 @@ class ActionServer extends EventEmitter2 {
     // Add feedback callback
     goal.on('feedback', feedback => {
       this.emit('feedback', feedback);
-    }).bind(this);
+    });
 
     // Add status callback
     goal.on('status', status => {
       this.emit('status', status);
-    }).bind(this);
+    });
 
     // Send goal
     goal.send();