Promote the currently running task.

async def promote(self, name, user, info=None):
        '''
        Promote the currently running task.
        '''
        task = asyncio.current_task()

        synt = getattr(task, '_syn_task', None)

        if synt is not None:

            if synt.root is None:
                return synt

            synt.root.kids.pop(synt.iden)
            synt.root = None
            return synt

        return await s_task.Task.anit(self, task, name, user, info=info)