Updated charted DEP to 0.4.X

packages/charted/lib/charts/chart_state.dart

Index: packages/charted/lib/charts/chart_state.dart
diff --git a/packages/charted/lib/charts/chart_state.dart b/packages/charted/lib/charts/chart_state.dart
index 7909ada63147fcbda01b771365bb5814968faea8..3b05e84e80e207bc1e087ef9bdad11ae54a9d5b6 100644
--- a/packages/charted/lib/charts/chart_state.dart
+++ b/packages/charted/lib/charts/chart_state.dart
@@ -35,7 +35,7 @@ abstract class ChartState implements ChangeNotifier {
   static const VAL_UNHIGHLIGHTED_CLASS = 'row-unhighlighted';
   static const VAL_HOVERED_CLASS = 'row-hovered';
 
-  static const COLUMN_CLASS_NAMES = const [
+  static const COLUMN_CLASS_NAMES = const <String>[
     COL_SELECTED_CLASS,
     COL_UNSELECTED_CLASS,
     COL_PREVIEW_CLASS,
@@ -45,7 +45,7 @@ abstract class ChartState implements ChangeNotifier {
     COL_HOVERED_CLASS
   ];
 
-  static const VALUE_CLASS_NAMES = const [
+  static const VALUE_CLASS_NAMES = const <String>[
     COL_SELECTED_CLASS,
     COL_UNSELECTED_CLASS,
     COL_PREVIEW_CLASS,
@@ -76,7 +76,7 @@ abstract class ChartState implements ChangeNotifier {
 
   /// Currently highlighted value, if any, represented as column and row.
   /// Highlight is result of a click on certain value.
-  Iterable<Pair<int, int>> highlights;
+  Iterable<Pair<int, int>> get highlights;
 
   /// Currently hovered value, if any, represented as column and row.
   /// Hover is result of mouse moving over a certian value in chart.