build(deps): bump serde from 1.0.199 to 1.0.200 (#264)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.199 to 1.0.200.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.199...v1.0.200)

---
updated-dependencies:
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

harness-support/rust/Cargo.toml

@@ -9,6 +9,6 @@ regress = "0.9.1"
 # TODO: Replace with upstream once merged:
 # https://github.com/Marwes/schemafy/pull/76
 # schemafy = { git = "https://github.com/woodruffw-forks/schemafy", rev = "de28e87" }
-serde = { version = "1.0.199", features = ["derive"] }
+serde = { version = "1.0.200", features = ["derive"] }
 serde_json = "1.0.116"
 typify = "0.0.16"