Extend properties: add Created & Updated for `TimeTracking.WorkIt…

…em` #58

global.json

@@ -1,5 +1 @@
-{
-  "sdk": {
-    "version": "1.0.4"
-  }
-}
+{"sdk":{"version":"1.1.0"}}

src/YouTrackSharp/TimeTracking/WorkItem.cs

@@ -42,7 +42,7 @@ public WorkItem(DateTime? date, TimeSpan duration, string description = null, Wo
         public string Id { get; set; }
 
         /// <summary>
-        /// Represents when the work item was created.
+        /// Represents when the work item was performed.
         /// </summary>
         [JsonConverter(typeof(UnixDateTimeOffsetConverter))]
         [JsonProperty("date")]
@@ -72,5 +72,19 @@ public WorkItem(DateTime? date, TimeSpan duration, string description = null, Wo
         /// </summary>
         [JsonProperty("author")]
         public Author Author { get; set; }
+
+        /// <summary>
+        /// Represents when the work item was created.
+        /// </summary>
+        [JsonConverter(typeof(UnixDateTimeOffsetConverter))]
+        [JsonProperty("created")]
+        public DateTime? Created { get; set; }
+
+        /// <summary>
+        /// Represents when the work item was updated.
+        /// </summary>
+        [JsonConverter(typeof(UnixDateTimeOffsetConverter))]
+        [JsonProperty("updated")]
+        public DateTime? Updated { get; set; }
     }
 }