woocommerce/includes/updates/woocommerce-update-2.3.php

<?php
/**
 * Update WC to 2.3.0
 *
 * @author 		WooThemes
 * @category 	Admin
 * @package 	WooCommerce/Admin/Updates
 * @version     2.3.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// _money_spent and _order_count may be out of sync - clear them
delete_metadata( 'user', 0, '_money_spent', '', true );
delete_metadata( 'user', 0, '_order_count', '', true );

// To prevent taxes being hidden when using a default 'no address' in a store with tax inc prices, set the woocommerce_default_customer_address to use the store base address by default
if ( '' === get_option( 'woocommerce_default_customer_address', false ) && wc_prices_include_tax() ) {
	update_option( 'woocommerce_default_customer_address', 'base' );
}