message: docs(readme): update rainbow pixel canvas example
diff: @@ -65,9 +65,9 @@ interact('.rainbow-pixel-canvas')
  ],
  })
  ],
  - })
  + listeners: {
  // draw colored squares on move
  - .on('dragmove', function (event) {
  + move: function (event) {
  var context = event.target.getContext('2d'),
  // calculate the angle of the drag direction
  dragAngle = 180 * Math.atan2(event.dx, event.dy) / Math.PI;
  @@ -79,6 +79,8 @@ interact('.rainbow-pixel-canvas')
  // draw squares
  context.fillRect(event.pageX - pixelSize / 2, event.pageY - pixelSize / 2,
  pixelSize, pixelSize);
  + }
  + }
  })
  // clear the canvas on doubletap
  .on('doubletap', function (event) {
  