v1.0.0-alpha.2 release

Merge rust-embedded#219

219: v1.0.0 alpha release r=therealprof a=ryankurte

🎉🎊🥳


See rust-embedded#177 for progress on blocking issues

Co-authored-by: ryan kurte <ryankurte@gmail.com>
Co-authored-by: Daniel Egger <daniel@eggers-club.de>

Merge rust-embedded#131

131: Release version 0.2.3-rc.1 r=therealprof a=ryankurte

hmm so cargo-release failed at pushing to master, but still pushed to [crates.io](https://crates.io/crates/embedded-hal/0.2.3-rc.1), might have to open a bug report there 😅

see also: rust-embedded#92 (comment)

Co-authored-by: Ryan Kurte <ryankurte@gmail.com>