Update futures-lite requirement from 1.12.0 to 2.0.0

Updates the requirements on [futures-lite](https://github.com/smol-rs/futures-lite) to permit the latest version.
- [Release notes](https://github.com/smol-rs/futures-lite/releases)
- [Changelog](https://github.com/smol-rs/futures-lite/blob/master/CHANGELOG.md)
- [Commits](smol-rs/futures-lite@v1.12.0...v2.0.0)

---
updated-dependencies:
- dependency-name: futures-lite
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -34,7 +34,7 @@ default-features = false
 optional = true
 
 [dev-dependencies]
-futures-lite = "1.12.0"
+futures-lite = "2.0.0"
 waker-fn = "1"
 
 [dev-dependencies.criterion]