Updated charted DEP to 0.4.X

packages/charted/lib/core/utils/lists.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.core.utils;
 
@@ skipping 81 matching lines @@
       }
     } else {
       while ((j = start + step * ++i) < stop) {
         values.add(integers ? j ~/ k : j / k);
       }
     }
 
     return new Range._internal(start, stop, step, values);
   }
 
-  Range._internal(this.start, this.stop, this.step, List values)
+  Range._internal(this.start, this.stop, this.step, List<num> values)
       : super(values);
 
   static int _integerConversionFactor(num val) {
     int k = 1;
     while (val * k % 1 > 0) {
       k *= 10;
     }
     return k;
   }
 }