2.1.293

Update json requirement from 2.7.3 to 2.9.1 (#410)

Updates the requirements on [json](https://github.com/ruby/json) to permit the latest version.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](https://github.com/ruby/json/compare/v2.7.3...v2.9.1)

---
updated-dependencies:
- dependency-name: json
  dependency-type: direct:production
...

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