added ids to inventory class

#3

BrickOwlSharp.Client/Inventory.cs

@@ -92,5 +92,8 @@ public class Inventory
 
         [JsonPropertyName("tier_price"), JsonConverter(typeof(TierPriceListConverter))]
         public List<TierPrice> TierPrices { get; set; }
+
+        [JsonPropertyName("ids")]
+        public List<Reference> Ids { get; set; } = new List<Reference>();
     }
 }

BrickOwlSharp.Client/Reference.cs

@@ -0,0 +1,17 @@
+using BrickOwlSharp.Client.Json;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json.Serialization;
+
+namespace BrickOwlSharp.Client
+{
+    public class Reference
+    {
+        [JsonPropertyName("id")]
+        public string Id { get; set; }
+
+        [JsonPropertyName("type"), JsonConverter(typeof(IdTypesStringConverter))]
+        public IdType Type { get; set; }
+    }
+}