Adds user roles to the customer export when using WooCommerce Customer/Order CSV Export

gistfile1.php

add_filter( 'wc_customer_order_csv_export_customer_headers', 'wooninja_customer_headers' );

function wooninja_customer_headers( $column_headers ) {
	$column_headers['user_role'] = 'user_role';
	return $column_headers;
}

add_filter( 'wc_customer_order_csv_export_customer_row', 'wooninja_customer_role', 10, 2 );

function wooninja_customer_role( $customer_data, $user ) {
	$customer_data['user_role'] = implode( ' ', $user->roles );
	return $customer_data;
}