Switch to embedded-hal version 1.0

[tgross35]

Embedded-hal has hit a RC and is looking for final feedback. It may be worth starting to port the EspressIf crates to help locate any flaws before the final release happens.

See rust-embedded/embedded-hal#177 (comment)

[Vollbrecht]

this crate already supports e-hal 1.0 rc 1 as well as e-hal 0.2

[tgross35]

Oh, I never noticed the feature. Thanks