Update playfair after package:flutter rename

packages/playfair/lib/playfair.dart

@@ -4,11 +4,10 @@
 
 library playfair;
 
-import 'dart:sky' as sky;
+import 'dart:ui' as ui;
 import 'dart:math' as math;
 
-import 'package:sky/material.dart';
-import 'package:sky/rendering.dart';
-import 'package:sky/widgets.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 
 part 'src/base.dart';

packages/playfair/lib/src/base.dart

@@ -236,7 +236,7 @@ class ChartPainter {
     return new Point(x, y);
   }
 
-  void _paintGrid(sky.Canvas canvas) {
+  void _paintGrid(ui.Canvas canvas) {
     Paint paint = new Paint()
       ..strokeWidth = kGridStrokeWidth
       ..color = kGridColor;
@@ -246,21 +246,21 @@ class ChartPainter {
     }
   }
 
-  void _paintChart(sky.Canvas canvas) {
+  void _paintChart(ui.Canvas canvas) {
     Paint paint = new Paint()
       ..strokeWidth = kMarkerStrokeWidth
       ..color = kMarkerColor;
-    Path path = new sky.Path();
+    Path path = new Path();
     path.moveTo(_markers[0].x, _markers[0].y);
     for (Point marker in _markers) {
       canvas.drawCircle(marker, kMarkerRadius, paint);
       path.lineTo(marker.x, marker.y);
     }
-    paint.setStyle(sky.PaintingStyle.stroke);
+    paint.setStyle(ui.PaintingStyle.stroke);
     canvas.drawPath(path, paint);
   }
 
-  void _paintIndicator(sky.Canvas canvas) {
+  void _paintIndicator(ui.Canvas canvas) {
     if (_indicator == null)
       return;
     Paint paint = new Paint()
@@ -271,7 +271,7 @@ class ChartPainter {
       _indicator.labelPainter.paint(canvas, _indicator.labelPosition.toOffset());
   }
 
-  void paint(sky.Canvas canvas, Rect rect) {
+  void paint(ui.Canvas canvas, Rect rect) {
     if (rect != _rect)
       _needsLayout = true;
     _rect = rect;

packages/playfair/pubspec.yaml

 name: playfair
 description: A simple charting library for Flutter
-version: 0.0.9
+version: 0.0.10
 author: Flutter Authors <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/playfair
 dependencies:
-  sky: any
-  sky_tools: any
+  flutter: ">=0.0.3 <0.1.0"
 dev_dependencies:
+  sky_tools: any
   test: ^0.12.0
 environment:
   sdk: '>=1.8.0 <2.0.0'