Update ICU to 58.1

source/data/zone/en_GB.txt

Index: source/data/zone/en_GB.txt
diff --git a/source/data/zone/en_GB.txt b/source/data/zone/en_GB.txt
index 0d5c241ee19a922744cae8f72905eeea3cbcfd2d..813a9017ab1d385990f8c4a7da47eb68daf9757d 100644
--- a/source/data/zone/en_GB.txt
+++ b/source/data/zone/en_GB.txt
@@ -1,14 +1,8 @@
-// ***************************************************************************
-// *
-// * Copyright (C) 2015 International Business Machines
-// * Corporation and others. All Rights Reserved.
-// * Tool: org.unicode.cldr.icu.NewLdml2IcuConverter
-// * Source File: <path>/common/main/en_GB.xml
-// *
-// ***************************************************************************
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
 en_GB{
     %%Parent{"en_001"}
-    Version{"2.1.19.79"}
+    Version{"2.1.29.24"}
     zoneStrings{
         "Europe:London"{
             sd{"BST"}