Hook into the plugin update process of WordPress part II

<?php
$obj = new stdClass();
$obj->slug = 'autoupdater/autoupdater.php';
$obj->name = 'Autoupdate Tester';
$obj->plugin_name = 'autoupdater/autoupdater.php';
$obj->new_version = '1.2';
$obj->requires = '4.0';
$obj->tested = '4.2.2';
$obj->downloaded = 12540;
$obj->last_updated = '2015-06-01';
$obj->sections = array(
    'description' => 'The new version of the Autoupdate Tester',
    'another_section' => 'This is another section',
    'changelog' => 'Some new features'
);
$obj->download_link = 'http://websupporter.net/current-version.zip';
echo serialize($obj);
?>