Add to prelude.

Author: thejpster

src/prelude.rs

@@ -14,6 +14,7 @@ pub use ::timer::CountDown as _embedded_hal_timer_CountDown;
 pub use ::blocking::delay::DelayMs as _embedded_hal_blocking_delay_DelayMs;
 pub use ::blocking::delay::DelayUs as _embedded_hal_blocking_delay_DelayUs;
 pub use ::digital::OutputPin as _embedded_hal_digital_OutputPin;
+pub use ::digital::InputPin as _embedded_hal_digital_InputPin;
 pub use ::serial::Read as _embedded_hal_serial_Read;
 pub use ::serial::Write as _embedded_hal_serial_Write;
 pub use ::spi::FullDuplex as _embedded_hal_spi_FullDuplex;