Bump either from 1.8.0 to 1.8.1 (#498)

Bumps [either](https://github.com/bluss/either) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/bluss/either/releases)
- [Commits](https://github.com/bluss/either/compare/1.8.0...1.8.1)

---
updated-dependencies:
- dependency-name: either
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -443,9 +443,9 @@ dependencies = [
 
 [[package]]
 name = "either"
-version = "1.8.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
+checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
 [[package]]
 name = "encode_unicode"