I'm trying to whitelist a custom attribute that is not supposed to have any value in XSS protection config so that when I enter something like <div new-attribute></div> in text editor, the new-attribute does not get stripped. But it seems like all the attributes defined in the configs need a regex filter rule and therefore the attribute in the text editor needs a value assigned in order to not to be stripped. Is there any way I can achieve this? to have <div new-attribute> and not get stripped?