WooCommerce Deposits 2.3.4

* Fix - No emails sent on child orders.
* Fix - Division by zero error when coupon discount is zero in cart.

* Fix - Don't adjust discount value manually for plans.

* Fix - Coupons with a Minimum spend amount cannot be applied with products using deposits
* Fix - Adding interest to a payment plan above 100% of product cost does not calculate properly in cart total
* Fix - 0% / $0 Payment Plan still required a gateway at checkout.