Updated charted DEP to 0.4.X

packages/charted/lib/selection/selection_scope.dart

Index: packages/charted/lib/selection/selection_scope.dart
diff --git a/packages/charted/lib/selection/selection_scope.dart b/packages/charted/lib/selection/selection_scope.dart
index 38d43f25948cc0e44809089aec76beb80790fb76..03c2d392b51cc4626a5a35b229963a8bf4ba4d0d 100644
--- a/packages/charted/lib/selection/selection_scope.dart
+++ b/packages/charted/lib/selection/selection_scope.dart
@@ -11,7 +11,7 @@ part of charted.selection;
 /** SelectionScope represents a scope for all the data and DOM operations. */
 class SelectionScope {
   Expando _associations = new Expando();
-  Expando<Map<String, Pair<Function, bool>>> _listeners = new Expando();
+  Expando<Map<String, Pair<EventListener, bool>>> _listeners = new Expando();
   Element _root;
 
   /** Creates a new selection scope with document as the root. */
@@ -57,7 +57,7 @@ class SelectionScope {
   datum(Object element) => element == null ? null : _associations[element];
 
   /** Associates data to the given [element]. */
-  associate(Object element, datum) =>
+  associate(Element element, datum) =>
       datum != null ? _associations[element] = datum : null;
 
   /**