Add FolderSummary and FolderCompletion events

These will be needed to be compatible with Syncthing 0.11.0

src/SyncTrayzor/SyncThing/Api/EventType.cs

@@ -26,5 +26,7 @@ namespace SyncTrayzor.SyncThing.Api
         DeviceRejected,
         ConfigSaved,
         DownloadProgress,
+        FolderSummary,
+        FolderCompletion,
     }
 }