Invalid calender props on how to change panel colors in the demo page

[photkosee]

On the web demo, the props passing to the calender component for customizing the panel colors are wrong.

Currently being: <Calendar values={values} until={until} weekNames={weekNames} monthNames={monthNames}/>

While it should be: <Calendar values={values} until={until} panelColors={panelColors} />

I had made a pull request solving this issue, feel free to merge my pull request or you can fix and commit a new one yourself.