Deprecate xml2js and jsn2xml nodes

Replaced by single XML node

nodes/core/deprecated/73-parsexml.js

@@ -15,11 +15,12 @@
  **/
 
 module.exports = function(RED) {
+    "use strict";
     var util = require("util");
     var parseString = require('xml2js').parseString;
     var useColors = true;
     //util.inspect.styles.boolean = "red";
-    
+
     function Xml2jsNode(n) {
         RED.nodes.createNode(this,n);
         this.useEyes = n.useEyes||false;

nodes/core/deprecated/74-js2xml.js

@@ -15,13 +15,14 @@
  **/
 
 module.exports = function(RED) {
+    "use strict";
     var js2xmlparser = require("js2xmlparser");
-    
+
     function Js2XmlNode(n) {
         RED.nodes.createNode(this,n);
         this.root = n.root;
         var node = this;
-    
+
         this.on("input", function(msg) {
             try {
                 var root = node.root || typeof msg.payload;