update files

bin/emulator.js

@@ -70,4 +70,3 @@ function normalizeExecArgs(command, options){
 }
 
 module.exports = Emulator;
-

main.js

@@ -116,7 +116,7 @@ if (cluster.isMaster) {
       });
     });
 
-    stream.stderr.on('error', function (error){
+    stream.stderr.on('data', function (error){
       emulator.stop();
       process.send({
         event: 'error',