Updated charted DEP to 0.4.X

packages/charted/lib/charts/data_transformers/filter_transformer.dart

 //
 // Copyright 2014 Google Inc. All rights reserved.
 //
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 //
 
 part of charted.charts;
 
 typedef bool FilterFunction(dynamic value);
 
 /// Transforms the ChartData base on the specified FilterDefinitions.  Each row
 /// of data will be tested by passing the value at target column to the filter
 /// function.  If filter function returns false, the row will be filtered out.
 /// This transformer does not modify the column part of the input ChartData.
 class FilterTransformer extends ChangeNotifier
     implements ChartDataTransform, ChartData {
   final SubscriptionsDisposer _dataSubscriptions = new SubscriptionsDisposer();
-  Iterable<ChartColumnSpec> columns;
-  ObservableList<Iterable> rows = new ObservableList();
+  List<ChartColumnSpec> columns;
+  ObservableList<List> rows = new ObservableList();
   List<FilterDefinition> filterFunctions;
   ChartData _data;
 
   FilterTransformer(this.filterFunctions);
 
   /// Transforms the input data with the list of [FilterDefinition] specified in
   /// the constructor.  If the rows and columns are ObservableList in the data,
   /// changes in rows and columns in input data will trigger transform to be
   /// performed again to update the output rows and columns.
   ChartData transform(ChartData data) {
@@ skipping 34 matching lines @@
       }
     }
   }
 }
 
 class FilterDefinition {
   final FilterFunction filterFunc;
   final int targetColumn;
   FilterDefinition(this.targetColumn, this.filterFunc);
 }