Bump serde_json from 1.0.82 to 1.0.83 (paritytech#806)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.82 to 1.0.83.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.82...v1.0.83)

---
updated-dependencies:
- dependency-name: serde_json
  dependency-type: direct:production
  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>