Bump jwt from 2.1.0 to 2.2.0
Bump jwt from 2.1.0 to 2.2.0

Bumps [jwt](https://github.com/jwt/ruby-jwt) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/jwt/ruby-jwt/releases)
- [Changelog](https://github.com/jwt/ruby-jwt/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jwt/ruby-jwt/compare/v2.1.0...v2.2.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2