MkIssueEvents.java:139-144: Make it possible to set the...

The puzzle `1063-0509ffcb` in [`src/main/java/com/jcabi/github/mock/MkIssueEvents.java`](https://github.com/jcabi/jcabi-github/blob/master/src/main/java/com/jcabi/github/mock/MkIssueEvents.java) (lines 139-144) has to be resolved: Make it possible to set the "assignee" field for "assigned"/"unassigned" events. Make it possible to set the "milestone" field for "milestoned"/"demilestoned" events. Make it possible to set the "rename" field for "renamed" events. Make it possible to set the "commit_id" field for events related to commits. See https://developer.github.com/v3/issues/events/ for details.

The puzzle was created by Chris Rebert on 15-Apr-15.

Estimate: 30 minutes, role: IMP.

If you have any technical questions, don't ask me, submit new tickets instead. The task will be "done" when the problem is fixed and the text of the puzzle is _removed_ from the source code. Here is more about [PDD](http://www.yegor256.com/2009/03/04/pdd.html) and
[about me](http://www.yegor256.com/2017/04/05/pdd-in-action.html).