js fix for uglyjs compatibility

client/wsrpc.js

@@ -47,7 +47,7 @@
             return
           }
           // Send response
-          var nparams = [].concat((data) => {
+          var nparams = [].concat(function (data) {
             var dataObj = {
               'op': 'response',
               'id': obj.id,
@@ -67,9 +67,9 @@
     /**
      * Call with variadic params
      */
-    this.call = function (method, ...params) {
-      // var aparam = Array.prototype.slice.call(arguments, 1)
-      var aparam = params
+    this.call = function (method) {
+      var aparam = Array.prototype.slice.call(arguments, 1)
+      // var aparam = params
       return new Promise(function (resolve, reject) {
         if (ctx.connected === false) {
           reject(Error('Not connected'))