1.1

• The official Docker image is now based on the python:3.8 image instead of python:3.8-alpine. This should
  make it easier to install other python packages when extending the locust docker image. #1435
• Allow Users to stop the runner by calling self.environment.runner.quit() (without deadlocking sometimes) #1448
• Cut to only 5% free space on the top of the graphs #1443
• Use csv module to generate csv data (solves issues with sample names that need escaping in csv) #1428
• Various documentation improvements