Hop Go SDK

• Add ability to override HTTP client with the function WithCustomHandler. This is useful for applications that need to do a unit test where making sure the right values are passed to the Hop client itself is important.
• Add cmd to deployment config.
• Add redirect object to domain objects.
• Add acknowledged key to deployment rollout.
• Add LatestRollout to deployment object. ActiveRollout is now deprecated.
• Add values InitContainerID, HealthCheckFailed, and LastUpdatedAt to deployment rollout object.