Merge pull request #30 from mnastalski/add-order-by-split

Add `addOrderBySplit` method

Author: mnastalski

src/Api/Request/Orders.php

@@ -249,6 +249,17 @@ public function addOrderReceiptFile(int $receiptId, string $file, string $extern
         );
     }
 
+    public function addOrderBySplit(int $orderId, array $itemsToSplit, ?float $deliveryCostToSplit = null): Response
+    {
+        return new Response(
+            $this->post('addOrderBySplit', [
+                'order_id' => $orderId,
+                'items_to_split' => $itemsToSplit,
+                'delivery_cost_to_split' => $deliveryCostToSplit,
+            ]),
+        );
+    }
+
     public function getInvoiceFile(int $invoiceId): Response
     {
         return new Response(