Control BarChart 0 value bar height

### Question
Hey guys, thanks for such perfect library, especially with 40.* update.

**Question**: I want to do those bars with 0 value (on image dashed border) as minimal as possible (like 5 px). Now the 0 value bar height is set up automatically, based on the max value (the more max value is - the smaller 0 bar will be, and vice versa).
Have not found any solution so far. Is it possible to do it?

### Background Info/Attempts

```
{({points, chartBounds}) => (

)}
```

Review the Bar usage shown in the issue, starting with how points.yValue and chartBounds determine the rendered height. Trace the zero-value bar sizing behavior and identify where a minimum height could be configured. Done means zero-value bars can use a small target height such as 5 px without changing nonzero bars.

Written by the indexing model from the issue text.