fix ISO8601 parsing of datetime

EDPlayerJournal/Entries/Entry.cs

@@ -102,7 +102,7 @@ public class Entry {
         this.datetime = json.GetValue("timestamp")?.ToString();
 
         if (!string.IsNullOrEmpty(this.datetime)) {
-            this.timestamp = DateTime.Parse(this.datetime);
+            this.timestamp = DateTime.Parse(this.datetime, null, System.Globalization.DateTimeStyles.RoundtripKind);
         }
     }