chore(deps): update rust crate futures to 0.3.31 (#60)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [futures](https://rust-lang.github.io/futures-rs)
([source](https://redirect.github.com/rust-lang/futures-rs)) |
dev-dependencies | patch | `0.3.30` -> `0.3.31` |
| [futures](https://rust-lang.github.io/futures-rs)
([source](https://redirect.github.com/rust-lang/futures-rs)) |
dependencies | patch | `0.3.30` -> `0.3.31` |

---

### Release Notes

<details>
<summary>rust-lang/futures-rs (futures)</summary>

###
[`v0.3.31`](https://redirect.github.com/rust-lang/futures-rs/blob/HEAD/CHANGELOG.md#0331---2024-10-05)

[Compare
Source](https://redirect.github.com/rust-lang/futures-rs/compare/0.3.30...0.3.31)

- Fix use after free of task in `FuturesUnordered` when dropped future
panics
([#&#8203;2886](https://redirect.github.com/rust-lang/futures-rs/issues/2886))
- Fix soundness bug in `task::waker_ref`
([#&#8203;2830](https://redirect.github.com/rust-lang/futures-rs/issues/2830))
This is a breaking change but allowed because it is soundness bug fix.
- Fix bugs in `AsyncBufRead::read_line` and `AsyncBufReadExt::lines`
([#&#8203;2884](https://redirect.github.com/rust-lang/futures-rs/issues/2884))
- Fix parsing issue in `select!`/`select_biased!`
([#&#8203;2832](https://redirect.github.com/rust-lang/futures-rs/issues/2832))
This is technically a breaking change as it will now reject a very odd
undocumented syntax that was previously accidentally accepted.
- Work around issue due to upstream `Waker::will_wake` change
([#&#8203;2865](https://redirect.github.com/rust-lang/futures-rs/issues/2865))
- Add `stream::Iter::{get_ref,get_mut,into_inner}`
([#&#8203;2875](https://redirect.github.com/rust-lang/futures-rs/issues/2875))
- Add `future::AlwaysReady`
([#&#8203;2825](https://redirect.github.com/rust-lang/futures-rs/issues/2825))
- Relax trait bound on non-constructor methods of
`io::{BufReader,BufWriter}`
([#&#8203;2848](https://redirect.github.com/rust-lang/futures-rs/issues/2848))

</details>

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Cargo.toml

@@ -38,7 +38,7 @@ oorandom   = "11.1.4"
 
 # Optional dependencies
 rayon     = { version = "1.10", optional = true }
-futures   = { version = "0.3.30", default-features = false, optional = true }
+futures   = { version = "0.3.31", default-features = false, optional = true }
 smol      = { version = "2.0.2", default-features = false, optional = true }
 tokio     = { version = "1.40.0", default-features = false, features = ["rt"], optional = true }
 async-std = { version = "1.13.0", optional = true }
@@ -52,7 +52,7 @@ tempfile   = "3.13.0"
 approx     = "0.5.1"
 quickcheck = { version = "1.0.3", default-features = false }
 rand       = "0.8.5"
-futures    = { version = "0.3.30", default-features = false, features = ["executor"] }
+futures    = { version = "0.3.31", default-features = false, features = ["executor"] }
 
 [features]
 default = ["cargo_bench_support", "rayon"]