chore(deps): bump oas from 3.5.4 to 3.5.6 (#225)

Bumps [oas](https://github.com/readmeio/oas/tree/HEAD/packages/cli) from 3.5.4 to 3.5.6.
- [Release notes](https://github.com/readmeio/oas/releases)
- [Changelog](https://github.com/readmeio/oas/blob/master/CHANGELOG.md)
- [Commits](https://github.com/readmeio/oas/commits/v3.5.6/packages/cli)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>