Update charted to 0.4.8 and roll

packages/yaml/lib/src/style.dart

 // Copyright (c) 2014, 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.
 
-library yaml.style;
-
 /// An enum of source scalar styles.
 class ScalarStyle {
   /// No source style was specified.
   ///
   /// This usually indicates a scalar constructed with [YamlScalar.wrap].
   static const ANY = const ScalarStyle._("ANY");
 
   /// The plain scalar style, unquoted and without a prefix.
   ///
   /// See http://yaml.org/spec/1.2/spec.html#style/flow/plain.
@@ skipping 47 matching lines @@
   ///
   /// See http://yaml.org/spec/1.2/spec.html#id2790088.
   static const FLOW = const CollectionStyle._("FLOW");
 
   final String name;
 
   const CollectionStyle._(this.name);
 
   String toString() => name;
 }