Bump either from 1.8.1 to 1.9.0 (#1084)

Bumps [either](https://github.com/bluss/either) from 1.8.1 to 1.9.0.
- [Commits](rayon-rs/either@1.8.1...1.9.0)

---
updated-dependencies:
- dependency-name: either
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: James Wilson <[email protected]>

Cargo.toml

@@ -47,7 +47,7 @@ color-eyre = "0.6.1"
 console_error_panic_hook = "0.1.7"
 darling = "0.20.3"
 derivative = "2.2.0"
-either = "1.8.1"
+either = "1.9.0"
 frame-metadata = { version = "16.0.0", default-features = false, features = ["current", "std"] }
 futures = { version = "0.3.27", default-features = false, features = ["std"] }
 getrandom = { version = "0.2", default-features = false }