v2.9

What's Changed

• Fix drafter-client resources so yml swagger spec is on classpath by @RickMoynihan in #583
• tag docker images, and push to GCP by @callum-oakley in #593
• Just json ld by @scottlowe in #599
• Global auth by @callum-oakley in #570

Full Changelog: v2.6...v2.9

Note: ignore v2.7 and v2.8! 😯