chore(deps): update rust crate rstest to 0.19.0 (#61)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [rstest](https://github.com/la10736/rstest) | dev-dependencies |
minor | `0.18.2` -> `0.19.0` |

---

### Release Notes

<details>
<summary>la10736/rstest (rstest)</summary>

###
[`v0.19.0`](https://github.com/la10736/rstest/blob/HEAD/CHANGELOG.md#0190-202449)

[Compare
Source](https://github.com/la10736/rstest/compare/v0.18.2...v0.19.0)

##### Changed

- Defined `rust-version` for each crate (see
[#&#8203;227](https://github.com/la10736/rstest/issues/235))

##### Fixed

-   `#[once]` fixtures now require the returned type to be
[`Sync`](https://doc.rust-lang.org/std/marker/trait.Sync.html) to
prevent UB
when tests are executed in parallel. (see
[#&#8203;235](https://github.com/la10736/rstest/issues/235)
    for more details)

- `#[future(awt)]` and `#[awt]` now properly handle mutable (`mut`)
parameters by treating futures as immutable and
    treating the awaited rebinding as mutable.

</details>

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Cargo.toml

@@ -10,7 +10,7 @@ license = "MIT"
 winnow = "0.6.5"
 
 [dev-dependencies]
-rstest = "0.18.2"
+rstest = "0.19.0"
 insta = { version = "1.38.0", features = ["yaml"] }
 serde = "1.0.197"
 itertools = "0.12.1"