Removing redundancies in Woo-Commerce node. (#596)

* Iterating additionalFields given instead of hard coding the interface to match them when creating a product

* Removed redundancy for product creation/update and order create.

Co-authored-by: Omar Ajoue <krynble@gmail.com>

packages/nodes-base/nodes/WooCommerce/OrderInterface.ts

@@ -46,6 +46,7 @@ export interface ICouponLine {
 }
 
 export interface IOrder {
+	[index: string]: any
 	billing?: IAddress;
 	coupon_lines?: ICouponLine[];
 	currency?: string;