Add support for iOS 12.3 and 13 from xcode 11 beta

Author: Cédric Moreaux

DeviceSupport/12.3.zip

@@ -77,3 +77,6 @@ optional arguments:
 	* 12.2 (16E5181e)	`2019/01/29`
 	* 12.2 (16E5212e)	`2019/03/07`
 	* 12.2 (16E226)		`2019/03/27`
+    * 12.3  `2019/06/04`
+6. iOS13
+    * 13.0  `2019/06/04`