The long-awaited beta for Jira 8.0 is out and ready for testing. It contains all the features we intend for Jira 8.0 and all the planned breaking changes that we were gradually releasing in EAP milestones.
As our special icing, we are also releasing a beta version of the upgrade documentation. Check it out here, and, should you have comments, add them under this post.
You can also tell us what you think about the beta release by posting a comment here.
atlassian-rest-common is a part of atlassian-rest module and so should use the same version.
Please note the Beta version uses a lot of dependencies in milestone versions since the final versions were not yet released at that stage.
However ultimately Jira 8.0.0 is using the component versions from Atlassian Platform 5.
The platform POM is in Bitbucket and there you can also find the groupId, artifactId and version for the platform components which Jira is going to use for the final 8.0.0 release (the only exception will be atlassian-webhooks where Jira is using an older version).
Let us know if you have further questions about the versions.