Ability to Hash Visitor Email using SHA256

Many social pixels want you to provide an email address that’s hashed, typically using SHA256.

I manually updated frontend.php to do the following, but it would be overwritten when you push out an update. So, having this ability as a checkbox or something in Admin would be a nice feature.

Here’s the code I’ve implemented on lines 133-135:

if ( $gtm4wp_options[ GTM4WP_OPTION_INCLUDE_USEREMAIL ] ) {
	$dataLayer['visitorEmail'] = ( empty( $current_user->user_email ) ? '' : hash('sha256', ($current_user->user_email)) );
}