Update universal-dapp.js

src/universal-dapp.js

@@ -8,7 +8,7 @@ var BN = ethJSUtil.BN
 var remixLib = require('remix-lib')
 var EventManager = remixLib.EventManager
 var crypto = require('crypto')
-var txRunner = remixLib.execution.txRunner
+var TxRunner = remixLib.execution.txRunner
 var txExecution = remixLib.execution.txExecution
 var txFormat = remixLib.execution.txFormat
 var txHelper = remixLib.execution.txHelper