feature: Impl Client::{supports_try_acquire, try_acquire}

[NobodyXu]

Resolve #72

[weihanglo]

I am not super familiar with the compatibility between these changes. It's better to have another pair of eyes. @petrochenkov do you have time to review?

[NobodyXu]

P.S. I was trying to run cargo +nightly update -Zminimal-versions and got 😂:

thread 'main' panicked at src/cargo/util/context/mod.rs:412:20:
already borrowed: BorrowMutError
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It seems to pretty persistent when using Cargo.lock from 845870a

Edit:

Issue is fixed after removing Cargo.lock

[weihanglo]

P.S. I was trying to run cargo +nightly update -Zminimal-versions and got 😂:

thread 'main' panicked at src/cargo/util/context/mod.rs:412:20:
already borrowed: BorrowMutError
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It seems to pretty persistent when using Cargo.lock from 845870a

Edit:

Issue is fixed after removing Cargo.lock

This was a bug in Cargo rust-lang/cargo#13647. A new nightly with that fix will be out today.

[the8472]

Can you clean up the branch's git history a bit? The "fix ..." commits likely won't help future readers through the history

[the8472]

Other than the workflow comment it LGTM now.

[weihanglo]

Looks good. Thanks!

BTW, could you clean up the commit history again? Intermediate commits don't help much for future contributors (or future us 😆).

For me, I might break them into one for CI update, One for try_acquire support, one for FIFO conversion optimization, and probably tests.

[weihanglo]

Thanks!