fix(core): update

ts/index.ts

@@ -1,21 +1,22 @@
-import * as plugins from './smartxml.plugins';
+import * as plugins from './smartxml.plugins.js';
 
 export class SmartXml {
   constructor() {}
 
   public parseXmlToObject<T = any>(xmlStringArg: string): T {
-    const jsonObject = plugins.fastXmlParser.parse(xmlStringArg);
+    const parser = new plugins.fastXmlParser.XMLParser();
+    const jsonObject = parser.parse(xmlStringArg);
     return jsonObject;
   }
 
   public createXmlFromObject(jsObject: any): string {
-    const jsToXmlParser = new plugins.fastXmlParser.j2xParser({
+    const jsToXmlParser = new plugins.fastXmlParser.XMLBuilder({
       ignoreAttributes: false,
       attributeNamePrefix: "@_",
       format: true,
       indentBy: '  ',
     });
-    const xml = jsToXmlParser.parse(jsObject);
+    const xml = jsToXmlParser.build(jsObject);
     return '<?xml version="1.0" encoding="UTF-8"?>\n' + xml;
   }
 }