Merge pull request #221 from lootlocker/fix/DateTime-acquisition_date…

…-should-be-nullable

fix(runtime/game): DateTime acquisition_date is now nullable#19

Runtime/Game/Requests/PlayerRequest.cs

@@ -183,7 +183,7 @@ public class LootLockerInventory
         public int? variation_id { get; set; }
         public string rental_option_id { get; set; }
         public string acquisition_source { get; set; }
-        public DateTime acquisition_date { get; set; }
+        public DateTime? acquisition_date { get; set; }
         public LootLockerCommonAsset asset { get; set; }
         public LootLockerRental rental { get; set; }