cargo-udeps fails due to compilation error of ahash crate

[rina23q]

Describe the bug
cargo-udeps starts failing. See this run.

   Compiling ahash v0.7.7
    Checking hex v0.4.3
error[E0635]: unknown feature `stdsimd`
  --> /home/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.7.7/src/lib.rs:33:42
   |
33 | #![cfg_attr(feature = "stdsimd", feature(stdsimd))]
   |                                          ^^^^^^^
For more information about this error, try `rustc --explain E0635`.
error: could not compile `ahash` (lib) due to previous error                                ^^^^^^^

This issue has already been captured in tkaitchuck/aHash#200, however, we don't have direct dependency on ahash. Actually chain dependency starting from rumqttd.

rumqttd 0.18.0 (upgrading to 0.19.0 has breaking change, meaning that we have to change our code)
-> metrics-exporter-prometheus 0.12.2: ^0.12.1 (latest 0.13.0)
-> indexmap 1.9.3: ^1 (latest 2.x)
-> hashbrown 0.12.3: ^0.12 (latest 0.14.3)
-> ahash 0.7.7: ^0.7.0 (latest 0.8.7, which has the fix)

Unfortunately, upgrading rumqttd to 0.19.0 won't help as it still has a dependency on metrics-exporter-prometheus ^0.12.1.

To Reproduce
Run cargo-udeps job.

Expected behavior
No compilation error.

Screenshots

Environment (please complete the following information):

• OS [incl. version]
• Hardware [incl. revision]
• System-Architecture [e.g. result of "uname -a"]
• thin-edge.io version [e.g. 0.1.0]

Additional context

[reubenmiller]

Pinning to a specific nightly build has fixed the issue for now.