include z min max in bbox argument to subprocess

[Ylannl]

If I understand correctly currently only x and y min/max values of the tile bounding box are passed (https://github.com/3DGI/tyler/blob/b0c32c1b918ddcb58faddc8931b029799aa4d758/src/main.rs#L407). Would be helpful to include also the z min/max values.

[balazsdukai]

Yes true. I thought the z won't be needed.