Typo in drawOutOfBound property

Removed the 's' at the end

README.md

@@ -80,7 +80,7 @@ chart.setOption({
 
         // set to true to allow word being draw partly outside of the canvas.
         // Allow word bigger than the size of the canvas to be drawn
-        drawOutOfBounds: false,
+        drawOutOfBound: false,
 
         // Global text style
         textStyle: {