old_contents: from .core import HttpLocust, Locust, TaskSet, TaskSequence, task, seq_task
  from .exception import InterruptTaskSet, ResponseError, RescheduleTaskImmediately
  
  __version__ = "0.8.1"
  
new_contents: from .core import HttpLocust, Locust, TaskSet, TaskSequence, task, seq_task
  from .exception import InterruptTaskSet, ResponseError, RescheduleTaskImmediately
  
  __version__ = "0.9.0.dev0"
  
subject: bump version to 0.9.0.dev0 (#855)