How to run non-Cargo commands?

[RReverser]

I want to use this crate with wasm-pack test, which, by itself, is a wrapper for Cargo that sets up custom environment.

Right now I can only invoke cargo minimal-versions ... followed by Cargo subcommands and not by arbitrary commands.

[taiki-e]

• cargo minimal-versions forwards flags to cargo, so it may be possible to support custom subcommands on the wasm-pack side.

• I'm not sure how realistic it would be to add a generic way to cargo-minimal-versions to handle this; cargo-minimal-versions does some cargo-specific processing to eliminate false negatives/positives, but this involves manifest changes, etc. and is not easy to make persistent, unlike cargo-llvm-cov's show-env subcommand. Support cargo minimal-versions generate-lockfile #18

• Maybe it would be more realistic to support subcommands like cargo minimal-version wasm-pack, like cargo-llvm-cov's cargo llvm-cov nextest.