Why is plotters::prelude::Ranged not implemented for u8 and u16 and other common primitives?

[Supermarcel10]

Are there any technical reasons plotters::prelude::Ranged is not implemented for Range<T> for primitives like u8 or u16?

To me, this seems like an inconsistency in the charting library.

For example, the following code will not compile:

let x_range = 0u8..128u8;

let mut chart = ChartBuilder::on(&root)
	.x_label_area_size(20)
	.y_label_area_size(20)
	.margin(5)
	.build_cartesian_2d(x_range.clone(), 700f32..1200f32)?
	.set_secondary_coord(x_range, -20f32..40f32);

In this scenario, it would make sense to just define instead 0u32..128u32, but this seems wasteful for some scenarios. Additionally, if any of the range ends is retrieved, a cast is necessary. As an example:

let x_max: u8 = get_x_max();
let x_range = 0u32..x_max as u32;

let mut chart = ChartBuilder::on(&root)
	.x_label_area_size(20)
	.y_label_area_size(20)
	.margin(5)
	.build_cartesian_2d(x_range.clone(), 700f32..1200f32)?
	.set_secondary_coord(x_range, -20f32..40f32);