Using --target in new arg forwarding

[max-sixty]

What happened?

Thanks a lot for the changes from #301.

Almost everything works, but I'm not sure how to pass --target. Specifically:

• It seems that -p and --lib need to go before the --, and then other items go after; e.g. from 0.21.0 to 0.21.2:

  -cargo insta test --accept -- -p mdbook-prql run_examples
  +cargo insta test --accept -p mdbook-prql -- run_examples

• But I can't get cargo insta test --accept -- --target=wasm32-unknown-unknown to work, with --target either before the -- or after. (after two -- doesn't raise an error but also doesn't seem to do anything)

    Finished test [unoptimized + debuginfo] target(s) in 0.36s
     Running unittests src/main.rs (target/debug/deps/mdbook_prql-c1048722bc7cd3a6)
  error: Unrecognized option: 'target'
  

(ref PRQL/prql#1172)

Sorry if this is a pain...

Reproduction steps

No response

Insta Version

0.21.2

rustc Version

rustc 1.64.0 (a55dd71d5 2022-09-19)

What did you expect?

No response

[max-sixty]

Thank you @mitsuhiko !