Add deleted ChangeItem

#197

TMDbLib/Objects/Changes/ChangeAction.cs

@@ -13,6 +13,9 @@ namespace TMDbLib.Objects.Changes
         Created = 2,
 
         [EnumValue("updated")]
-        Updated = 3
+        Updated = 3,
+
+        [EnumValue("deleted")]
+        Deleted = 4
     }
 }

TMDbLib/Objects/Changes/ChangeItemDeleted.cs

@@ -0,0 +1,16 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace TMDbLib.Objects.Changes
+{
+    public class ChangeItemDeleted : ChangeItemBase
+    {
+        public ChangeItemDeleted()
+        {
+            Action = ChangeAction.Deleted;
+        }
+
+        [JsonProperty("original_value")]
+        public JToken OriginalValue { get; set; }
+    }
+}

TMDbLib/Objects/Changes/ChangeItemUpdated.cs

@@ -9,16 +9,10 @@ namespace TMDbLib.Objects.Changes
         {
             Action = ChangeAction.Updated;
         }
-
-        /// <summary>
-        /// This field is not always set
-        /// </summary>
+        
         [JsonProperty("original_value")]
         public JToken OriginalValue { get; set; }
-
-        /// <summary>
-        /// This field is not always set
-        /// </summary>
+        
         [JsonProperty("value")]
         public JToken Value { get; set; }
     }

TMDbLib/Utilities/Converters/ChangeItemConverter.cs

@@ -38,6 +38,9 @@ namespace TMDbLib.Utilities.Converters
                     case ChangeAction.Updated:
                         result = new ChangeItemUpdated();
                         break;
+                    case ChangeAction.Deleted:
+                        result = new ChangeItemDeleted();
+                        break;
                     default:
                         throw new ArgumentOutOfRangeException();
                 }