Upgrade heapless to 0.9, embedded-io-async to 0.7 and defmt to 1.x

[brainstorm]

No description provided.

[Dirbaio]

See #4745 for embedded-io

We can't upgade heapless until smoltcp upgrades it.

About defmt: we're already using 1.0 everywhere, there's nothing to upgrade.

[brainstorm]

See #4745 for embedded-io

We can't upgade heapless until smoltcp upgrades it.

About defmt: we're already using 1.0 everywhere, there's nothing to upgrade.

Thanks for the feedback @Dirbaio! ... what's the blocker on heapless 0.9 for smol? I see it merged already in smoltcp-rs/smoltcp#1083 ?

[Dirbaio]

A release.

[brainstorm]

About defmt: we're already using 1.0 everywhere, there's nothing to upgrade.

If I understood correctly from the last comment in rust-embedded/embedded-hal#716 (comment) the removal of all defmt-03 references is a good cleanup to do/change (upgrade) regardless? ... and if it's still breaking, would it make sense to semver-bump it accordingly or you want to keep defmt-03 for a while longer?

A [smol] release.

Pre-xmas communitly present? 🙏🏻 Let me know if I can help in any way with this :)

I'll now get acquainted with https://github.com/embassy-rs/cargo-embassy-devtool to compile all embassy-rs locally avoid CI failed builds spam (sorry about them!).

[Dirbaio]

the removal of all defmt-03 references is a good cleanup to do/change (upgrade) regardless?

Embassy crates don't define any defmt-03 features, they just use them from dependencies. If a new version of a dep adds the defmt feature we should upgrade to it, of course.