If I have a label bug and I would like it to be type: bug, I wish I could do something like this:

- name: "type: bug"
  alias: "bug"

And then label-syncer would:

• Create a new label type: bug if no label named either type: bug or bug exists, or
• Rename an existing label bug to be type: bug

This would make it much easier to make a set of existing repositories consistent.