Bump once_cell from 1.17.1 to 1.18.0

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.17.1 to 1.18.0.
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](matklad/once_cell@v1.17.1...v1.18.0)

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

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

Cargo.toml

@@ -18,7 +18,7 @@ cddl = "0.9.1"
 clap = { version = "4.2.4", features = ["derive"] }
 codegen = { git = "https://github.com/dcSpark/codegen", branch = "master" }
 either = "1.8.1"
-once_cell = "1.17.1"
+once_cell = "1.18.0"
 nom = "7.1.1"
 pathdiff = "0.2.1"
 which = { version = "4.4.0", optional = true, default-features = false }