EntityMetadataFlags missing fields (#202)

Author: ismaileke

src/types/entity/EntityMetadataFlags.php

@@ -134,4 +134,7 @@ private function __construct(){
 	public const HAPPY = 112;
 	public const SEARCHING = 113;
 	public const CRAWLING = 114;
+	public const TIMER_FLAG_1 = 115;
+	public const TIMER_FLAG_2 = 116;
+	public const TIMER_FLAG_3 = 117;
 }