refreshDataAsync() on interval

[jduysen]

I just want to see if there is an out of the box way that I am not seeing to call the refreshDataAsync tableau api function. As a way to get it working, I put an interval in the componentDidMount method of your TableauReports.js and that seems to work. I think I will probably also add 'interval' as an optional prop to the component so that I can define the interval on a per component basis. Let me know if that is functionality that already exists or if I should maybe create a branch to add those features to this library.

Thanks,

James

[coopermaruyama]

Hi, I've merged your PR and published at 2.2.0

Thanks!