HTTPS requests result in UNABLE_TO_VERIFY_LEAF_SIGNATURE

hyperquest_test.js

var https = require("https");

var curaUrl = "https://packages.curasystems.com/packages/datepicker-for-angular?version=0.0.2";
var googleUrl = "https://google.de";

var options = {
	strictSSL: false
};



hyperquest(curaUrl, options).pipe(process.stdout);
//hyperquest(googleUrl, options).pipe(process.stdout);

var options = {
  uri: 'https://packages.curasystems.com/packages/datepicker-for-angular?version=0.0.2',
  hostname: 'packages.curasystems.com',
  port: 443,
  path: '/packages/datepicker-for-angular',
  method: 'GET',
  rejectUnauthorized: false
};


/*
var req = https.request(options, function(res) {
  console.log(res.statusCode);
  res.on('data', function(d) {
    process.stdout.write(d);
  });
});
req.end();
*/