Bump serde_json from 1.0.79 to 1.0.81 (#180)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.79 to 1.0.81.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](https://github.com/serde-rs/json/compare/v1.0.79...v1.0.81)

---
updated-dependencies:
- dependency-name: serde_json
  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>
Co-authored-by: Dave G <davegallant@gmail.com>

Cargo.toml

@@ -10,7 +10,7 @@ serde_derive = "1.0.112"
 serde = "1.0.137"
 reqwest = { version = "0.11", default-features = false, features = ["json", "rustls-tls"] }
 tokio = { version = "1.18", features = ["full"] }
-serde_json = "1.0.68"
+serde_json = "1.0.81"
 log = "0.4"
 pretty_env_logger = "0.4.0"
 regex = "1.5.6"