the trait bound f32: From<f64> is not satisfied error on nightly

[doonv]

Describe the bug
While compiling epaint, this error occurs:

error[E0277]: the trait bound `f32: From<f64>` is not satisfied
    --> epaint-0.26.2/src/tessellator.rs:1816:34
     |
1816 |         let stroke = Stroke::new(2.0, Color32::from_rgb(150, 255, 150));
     |                      ----------- ^^^ the trait `From<f64>` is not implemented for `f32`, which is required by `{float}: Into<f32>`
     |                      |
     |                      required by a bound introduced by this call
     |
     = help: the following other types implement trait `From<T>`:
               <f32 as From<bool>>
               <f32 as From<f16>>
               <f32 as From<i16>>
               <f32 as From<i8>>
               <f32 as From<u16>>
               <f32 as From<u8>>
     = note: required for `f64` to implement `Into<f32>`
note: required by a bound in `stroke::Stroke::new`
    --> epaint-0.26.2/src/stroke.rs:23:28
     |
23   |     pub fn new(width: impl Into<f32>, color: impl Into<Color32>) -> Self {
     |                            ^^^^^^^^^ required by this bound in `Stroke::new`

To Reproduce
Steps to reproduce the behavior:

1. Use latest nightly rust
2. Build epaint

[crumblingstatue]

This will be fixed in next nightly, however the impl that broke inference might be readded in the future, so we might want to make this code more robust against inference errors anyway.