FYI: i just opened PRs for the update to 1.0 on two HALs (only compile-tested, but going from RC3 to release that should be fine) + `embedded-hal-mock`:
* https://github.com/Rahix/avr-hal/pull/488
* https://github.com/stm32-rs/stm32f4xx-hal/pull/723
* https://github.com/dbrgn/embedded-hal-mock/pull/105

let's hope other HALs & drivers follow suite soon (though for drivers this will take a bit longer as they generally need the HALs to implement & release this first to (a) be able to test and (b) have the examples & mock-tests compile) 🙂