Bump serde_json from 1.0.120 to 1.0.121 (#116)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.120 to 1.0.121.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.120...v1.0.121)

---
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>
Co-authored-by: Robin Bürgi <[email protected]>

Author: dependabot[bot]