Change intl to use new pub layout

pkg/intl/lib/bidi_utils.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Bidi stands for Bi-directional text.
  * According to http://en.wikipedia.org/wiki/Bi-directional_text:
  * Bi-directional text is text containing text in both text directionalities,
  * both right-to-left (RTL) and left-to-right (LTR). It generally involves text
  * containing different types of alphabets, but may also refer to boustrophedon,
@@ skipping 371 matching lines @@
 }
 
 /**
  * Check the estimated directionality of [str], return true if the piece of
  * text should be laid out in RTL direction. If [isHtml] is true, the string
  * is HTML or HTML-escaped.
  */
 bool detectRtlDirectionality(String str, [bool isHtml]) {
   return estimateDirectionOfText(str, isHtml) == TextDirection.RTL;
 }