Feature Request: Mixed-type charts to display multiple series types on the same chart

[GuntuAshok]

Feature Request

Description of Problem:

Currently there is no option to have mixed charts like the bar chart for primary Y-axis and a line chart for secondary Y-axis.

Potential Solutions:

I found the support of mixed chart type in d3fc examples here

https://d3fc.io/examples/series-canvas-multi/

https://github.com/d3fc/d3fc/tree/master/examples/series-canvas-multi/

Mixed chart option really helps to compare 2 different entities on same chart with distinction.