Assign or mention people when you create a pull request

[jmnavarro]

It would be great to support assignment in the pr -s command.

Given that Github only allows to assign to one single person, if you want your PR to be reviewed by more than one person, we could mention them (using @username) in the comments

[zenorocha]

Good, thanks @jmnavarro.

We need to add an --assignee option on gh pr.

[zenorocha]

Note for ourselves:

Every pull request is an issue, but not every issue is a pull request. For this reason, “shared” actions for both features, like manipulating assignees, labels and milestones, are provided within the Issues API.

https://developer.github.com/v3/pulls/#create-a-pull-request https://developer.github.com/v3/issues/#edit-an-issue