post https://eu-ext.linnworks.net/api/PurchaseOrder/Change_PurchaseOrderStatus
Change purchase order status. Can change from:
PENDING to OPEN, which will populate Due (OnOrder) values in stock levels,
OPEN to DELIVERED, which will consolidate Due values in stock levels
PARTIAL to DELIVERED, which will consolidate Due values in stock levels
Permissions Required: GlobalPermissions.Inventory.PurchaseOrder.EditPurchaseOrderNode
Rate limit: 150 / minute