Probably should list out chart types that are supported on README

[andyd0]

Like column charts are not. Package is easy to use given the dataframe support but would save time to know what chart types are actually supported

[dirkesquire]

I agree. Also spline charts don't seem supported either. I would really like to draw a line chart with smoothed curves.

e.g.: https://api.highcharts.com/highcharts/plotOptions.spline