Add a property "IsFavorite" for the drop zone.

Back/skydiveLogs-api.Data/JumpRepository.cs

@@ -48,6 +48,11 @@ namespace skydiveLogs_api.Data
             return result;
         }
 
+        public bool Update(Jump updatedJump)
+        {
+            throw new System.NotImplementedException();
+        }
+
         private readonly IDataProvider _dataProvider;
 
         private readonly LiteCollection<Jump> _col;