Custom component for marker

[mitaxe]

Now it is only possible to pass a static image to the marker. It would be nice to support
custom components. For example to display some dynamic values inside of it.

[kostiantyn-solianyk]

Would be really nice to have it!

[artsnr1]

+1

[s43]

+1

[BartusZak]

+1

[05798]

+1

[saulsharma]

+1

[bryanprimus]

i believe that now we can do this with StepMarker prop, but what about thumb? is it possible now to add custom component for thumb for dynamic values?