embedded_hal_async uses new nightly feature

[ImUrX]

error[E0635]: unknown feature `impl_trait_projections`
  --> /home/uri/.cargo/registry/src/proxy-git.cwkhome.fun-1ecc6299db9ec823/embedded-hal-async-0.2.0-alpha.0/src/lib.rs:13:31
   |
13 | #![feature(async_fn_in_trait, impl_trait_projections)]
   |                               ^^^^^^^^^^^^^^^^^^^^^^

[MabezDev]

Not much to be done here I'm afraid, sorry :(.

I only rebase on top of the latest stable branch, if you wish to use nightly features you will have to apply the patchset to a newer compiler and build for yourself. FYI next release it will be available if you can wait till then.