Provide integration with Jira, to update the fix version

[rnowosielski]

When release notes are generated, it would be nice if the Jira ticket got updated with the fix version.
There can be multiple fix versions.

[rnowosielski]

I guess this has to wait for this: https://answers.atlassian.com/questions/223091/rest-api-updating-an-issue-fixversion-give-error