fix #764 (#765)

Author: pjmolina

src/fxp.d.ts

@@ -406,7 +406,7 @@ export type ValidationError = {
 
 export class XMLParser {
   constructor(options?: X2jOptions);
-  parse(xmlData: string | Buffer ,validationOptions?: validationOptions | boolean): any;
+  parse(xmlData: string | Uint8Array, validationOptions?: validationOptions | boolean): any;
   /**
    * Add Entity which is not by default supported by this library
    * @param entityIdentifier {string} Eg: 'ent' for &ent;