Google Apps Script: create task in Amazing Marvin when new version of library appears in pypi

pypi_to_am.gs

var TARGET_EMAIL = '<AMAZING_MARVIN_IMPORT_EMAIL>'; 
var LIBRARY_NAME = '<SOME_LIBRARY>'
var URL_LIBRARIES_IO = 'https://libraries.io/pypi/LIBRARY_NAME/versions.atom'
var CATEGORY_OR_PROJECT = '<CATEGORY OR PROJECT IN AMAZING MARVIN>'

function parseXml() {
  var props = PropertiesService.getScriptProperties();
  var xml = UrlFetchApp.fetch(URL_LIBRARIES_IO).getContentText();
  var document = XmlService.parse(xml);
  var root = document.getRootElement();
  var atom = XmlService.getNamespace('http://www.w3.org/2005/Atom');

  var entries = document.getRootElement().getChildren('entry', atom);
  for (var i = 0; i < entries.length; i++) {
    var title = entries[i].getChild('title', atom).getText();
    var prop_title = props.getProperty(title);
    if(!prop_title) {
      Logger.log('New version found %s', title);
      var link = entries[i].getChild('link', atom).getAttribute('href').getValue();
      props.setProperty(title, '1')
      sendEmail(title, link);
    }
  }
}

function sendEmail(title, link) {
  var subject = Utilities.formatString('New version [%s %s](%s)  #"%s" +today', LIBRARY_NAME, title, link, CATEGORY_OR_PROJECT);
  GmailApp.sendEmail(TARGET_EMAIL, subject, '');
}