Updated charted DEP to 0.4.X

packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart

Index: packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart
diff --git a/packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart b/packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart
index e67fcaaeeb3b7ef6c71ad7d000ac97e015507e6e..4806d2d8c45c52ef70795607bf0a4c83c8c2a6c7 100644
--- a/packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart
+++ b/packages/charted/lib/charts/cartesian_renderers/line_chart_renderer.dart
@@ -10,7 +10,6 @@ part of charted.charts;
 
 class LineChartRenderer extends CartesianRendererBase {
   final Iterable<int> dimensionsUsingBand = const [];
-  final SubscriptionsDisposer _disposer = new SubscriptionsDisposer();
 
   final bool alwaysAnimate;
   final bool trackDataPoints;
@@ -249,7 +248,7 @@ class LineChartRenderer extends CartesianRendererBase {
     }
   }
 
-  void _mouseOverHandler(d, i, e) {
+  void _mouseOverHandler(d, int i, Element e) {
     if (area.state != null) {
       area.state.preview = int.parse(e.dataset['column']);
     }
@@ -261,7 +260,7 @@ class LineChartRenderer extends CartesianRendererBase {
     }
   }
 
-  void _mouseOutHandler(d, i, e) {
+  void _mouseOutHandler(d, int i, Element e) {
     if (area.state != null &&
         area.state.preview == int.parse(e.dataset['column'])) {
       area.state.preview = null;