using node-xml for generating prolog

Author: lalugeo

constants/index.js

@@ -30,5 +30,4 @@ module.exports = {
   FILEPATH_VAR: 'filepath',
   TITLE_VAR: 'title',
   DISPLAY_NAME_VAR: 'displayName',
-  XML_PROLOG_STRING: '<?xml version="1.0" encoding="UTF-8"?>',
 };

index.js

@@ -5,7 +5,6 @@ const mkdirp = require('mkdirp');
 const fs = require('fs');
 const path = require('path');
 const jestValidate = require('jest-validate');
-const constants = require('./constants');
 
 const buildJsonResults = require('./utils/buildJsonResults');
 const getOptions = require('./utils/getOptions');
@@ -26,7 +25,7 @@ const processor = (report, reporterOptions = {}, jestRootDir = null) => {
   mkdirp.sync(path.dirname(finalOutput));
 
   // Write data to file
-  fs.writeFileSync(finalOutput, constants.XML_PROLOG_STRING + xml(jsonResults, { indent: '  ' }));
+  fs.writeFileSync(finalOutput, xml(jsonResults, { indent: '  ', declaration: true }));
 
   // Jest 18 compatibility
   return report;