fix child_process

Author: Keyang

libs/core/workerMgr.js

@@ -1,11 +1,10 @@
 module.exports = workerMgr;
-var spawn = require("child_process").spawn;
 var eom = "\x03";
 var eom1 = "\x0e";
 var eom2 = "\x0f";
 var CSVError = require('./CSVError');
 function workerMgr() {
-
+  var spawn = require("child_process").spawn;
   var exports = {
     initWorker: initWorker,
     sendWorker: sendWorker,

package.json

@@ -234,5 +234,8 @@
     "test": "mocha ./test -R spec",
     "test-debug": "mocha debug ./test -R spec",
     "test-all": "mocha  ./test -R spec && CSV_WORKER=3 mocha ./test -R spec "
+  },
+  "browser":{
+    "child_process":false
   }
 }