Update ICU to 58.1

source/data/coll/bg.txt

Index: source/data/coll/bg.txt
diff --git a/source/data/coll/bg.txt b/source/data/coll/bg.txt
index 538d3258b5f89e720da728082e42803ad5989c6b..65994ef830fd78ec6202b1093a84fe5ce8772cc4 100644
--- a/source/data/coll/bg.txt
+++ b/source/data/coll/bg.txt
@@ -1,17 +1,11 @@
-// ***************************************************************************
-// *
-// * Copyright (C) 2015 International Business Machines
-// * Corporation and others. All Rights Reserved.
-// * Tool: org.unicode.cldr.icu.NewLdml2IcuConverter
-// * Source File: <path>/common/collation/bg.xml
-// *
-// ***************************************************************************
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
 bg{
     Version{"2.1.19.14"}
     collations{
         standard{
             Sequence{"[reorder Cyrl]"}
-            Version{"28"}
+            Version{"30"}
         }
     }
 }