Mahmoud Al-Qudsi b9c6806e45 Configure cargo to respect MSRV ...

The new 1.84 release has a new feature that makes `cargo update` MSRV-aware.

This is what it looks like in practice:

    Updating crates.io index
    Updating git repository `https://github.com/fish-shell/rust-pcre2`
From https://github.com/fish-shell/rust-pcre2
 * [new tag]         0.2.9-utf32 -> origin/tags/0.2.9-utf32
     Locking 7 packages to latest Rust 1.70 compatible versions
    Updating cc v1.2.6 -> v1.2.7
    Updating phf v0.11.2 -> v0.11.3
    Updating phf_codegen v0.11.2 -> v0.11.3
    Updating phf_generator v0.11.2 -> v0.11.3
    Updating phf_shared v0.11.2 -> v0.11.3
    Updating siphasher v0.3.11 -> v1.0.1
    Updating syn v2.0.94 -> v2.0.95

2025-01-09 16:50:13 -06:00

..

config.toml

Configure cargo to respect MSRV

2025-01-09 16:50:13 -06:00