Bumps Embedded-hal to 1.0-alpha.8 that introduces a new trait called SpiDevice that should be used instead of (SpiBus, CS). This version is also used in the stm32f4xx_hal
Closes #25
I could also add an example for SPI, but I'll leave that for another PR
Closes #25
I could also add an example for SPI, but I'll leave that for another PR