[xml2js] missing the Parser constructor on module

xml2js/xml2js-tests.ts

@@ -15,3 +15,5 @@ var builder = new xml2js.Builder({
 var outString = builder.buildObject({
     'hello': 'xml2js!'
 });
+
+var parser = new xml2js.Parser();

xml2js/xml2js.d.ts

@@ -16,6 +16,14 @@ declare module 'xml2js' {
             buildObject(rootObj: any): string;
         }
 
+        class Parser {
+            constructor(options?: Options);
+            processAsync(): any;
+            assignOrPush(obj: any, key: string, newValue: any): any;
+            reset(): any;
+            parseString(str: string , cb?: Function): void;
+        }
+
         interface RenderOptions {
             indent?: string;
             newline?: string;