MSRV not respected on aarch64-apple-darwin

[justinwsmith]

Problem:

MSRV is not respected on all platforms. The actual MSRV for aarch64-apple-darwin is 1.70.0.

The CI should check more platforms for MSRV, and should include the "bindgen" (and possibly other) features.

Relevant details

• Running on an M1 Mac:

  ❯ rustc -vV |grep host
  host: aarch64-apple-darwin

Build log:

• The log tells compiler and version.

  ❯ cargo msrv
  Fetching index
  Determining the Minimum Supported Rust Version (MSRV) for toolchain aarch64-apple-darwin
  Using check command cargo check
  ...
  │ error: package `home v0.5.9` cannot be built because it requires rustc 1.70.0 or newer, while the currently active rustc version is 1.66.1                                                                                                                                                                                 │
  │ Either upgrade to rustc 1.70.0 or newer, or use                                                                                                                                                                                                                                                                            │
  │ cargo update -p home@0.5.9 --precise ver                                                                                                                                                                                                                                                                                   │
  │ where `ver` is the latest version of `home` supporting rustc 1.66.1

• The dependency on home comes via bindgen:

  ❯ cargo tree -i home
  home v0.5.9
  └── which v4.4.2
  └── bindgen v0.69.2
      [build-dependencies]
      └── aws-lc-sys v0.13.0 (/Users/justinsmith/repos/aws-lc-rs/aws-lc-sys)
          └── aws-lc-rs v1.6.1 (/Users/justinsmith/repos/aws-lc-rs/aws-lc-rs)