BUG: SketchPicker Component in SSR project display warning props don't match
<code>SketchPicker</code> use in the SSR project:

`<div className="config-form">
       <SketchPicker
          color={color}
          onChange={this.handleColorChange}
          renderers={{ canvas: ServerCanvas }}
        />
 </div>`

chrome devtools show:

![image](https://user-images.githubusercontent.com/5476455/110310194-36761200-803d-11eb-890a-527e3919ce1f.png)

during debug the <code>SketchPicker </code> source code, I find there is something need update:

https://github.com/casesandberg/react-color/blob/master/src/components/sketch/Sketch.js#L118

![image](https://user-images.githubusercontent.com/5476455/110310724-d0d65580-803d-11eb-94f5-14f8a866c78c.png)

<code>Checkboard</code> need props <code>renderers</code>, then server render is the same with client render.
 may be I can pull requests resolve it.
