I have an e-h@0.2 Serial type, and I'm calling .forward (from e-h-compat on it). But when I call my function with it, which requires an `embedded-io::Read`, then I get:

```
the trait bound `Forward<Serial<stm32h7xx_hal::stm32::USART1>, _>: embedded_io::Read` is not satisfied
the following other types implement trait `embedded_io::Read`:
  &[u8]
  &mut T
```