PHP Parsedown, add target=_blank to links

In case you want all your links in your markdown to open in a new tab, you might want to add target="_blank" systematically. You can do it with Parsedown. However, I now use CommonMark. I'm not really sure why I changed & I'm not sure how to do this in common mark.

if (!class_exists('MyParsedown')){  
    class MyParsedown extends Parsedown {  
        protected function inlineLink($excerpt){  
            $link = parent::inlineLink($excerpt);  
            if (!isset($link))return null;  
            $link['element']['attributes']['target'] = '_blank';  
            // var_dump($link);  
            // throw new \Exception('love cats');  
            return $link;