Update metadata-json-lint requirement from ~> 2.0 to ~> 3.0
Update metadata-json-lint requirement from ~> 2.0 to ~> 3.0

Updates the requirements on [metadata-json-lint](https://github.com/voxpupuli/metadata-json-lint) to permit the latest version.
- [Release notes](https://github.com/voxpupuli/metadata-json-lint/releases)
- [Changelog](https://github.com/voxpupuli/metadata-json-lint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/voxpupuli/metadata-json-lint/compare/2.0.0...3.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
tohuwabohu/puppet-duplicity,tohuwabohu/puppet-duplicity