public function update_changelog($new_dir)
 {
     if (file_exists(trailingslashit($new_dir) . 'readme.txt')) {
         if (!class_exists('Automattic_Readme')) {
             include_once EDD_GIT_PLUGIN_DIR . 'includes/parse-readme.php';
         }
         $Parser = new Automattic_Readme();
         $content = $Parser->parse_readme(trailingslashit($new_dir) . 'readme.txt');
         if (isset($content['sections']['changelog'])) {
             $changelog = wp_kses_post($content['sections']['changelog']);
             update_post_meta($this->instance->download_id, '_edd_sl_changelog', $changelog);
             $this->instance->changelog = $changelog;
         }
     }
 }
<?php

/** Template version: 1.0.0 */
?>

<?php 
include CUAR_PLUGIN_DIR . '/libs/automattic/parse-readme.php';
$parser = new Automattic_Readme();
$readme = $parser->parse_readme(CUAR_PLUGIN_DIR . '/readme.txt');
echo $readme['sections']['changelog'];