Typo fix s/redraw/redraws/

As requested by jpetitcolas at marmelab#249 (comment)

README.md

@@ -86,7 +86,7 @@ In addition to this configuration object, it also exposes some public methods al
 
 *   **scale()** provides the horizontal scale, allowing you to retrieve bounding dates thanks to `.scale().domain()`,
 *   **filteredData()** returns an object with both `data` and `fullData` keys containing respectively bounds filtered data and full dataset.
-*   **draw(config, scale)** redraw chart using given configuration and `d3.scaleTime` scale
+*   **draw(config, scale)** redraws chart using given configuration and `d3.scaleTime` scale
 *   **destroy** execute this function before to removing the chart from DOM. It prevents some memory leaks due to event listeners.
 
 Hence, if you want to display number of displayed data and time bounds as in the [demo](https://marmelab.com/EventDrops/), you can use the following code: