WooCommerce Deposits 2.3.8

* Fix - Display of future discounts and correct discounted future payments not shown in order received and emails.
* Update - WC tested up to 3.3.

* Fix - Issue where deposit related columns in cart totals table are not displayed in mobile screen.
* Fix - Improve compatibility support with WooCommerce Memberships.
* Fix - When deposit product only has 1 in stock, future deposits will not allow payment.

* Fix - Error that may happens on specific PHP version when sending scheduled invoice email for the next payment plan order.
* Fix - Percentage coupon interpreted as fixed amount coupon on payment plan.