[Feature Request] Support Boundaries provided through the component

[0xphilipp]

Thanks for the awesome library. Im using it to draw multiple trends of similiar data.
Is it possible, to provide min / max (boundary) values to the library, so that charts are more meaningfull when displaying the same data.

In this example, the last chart looks like it has the same changes as the others, but in reality the range between min and max is a lot smaller.

I tried using the height, but this leads to other issues.