version 1.5.0

• Add support for python 3.9
• Update the print statement for starting jobs to be more structured. This will
  make the output easier to to read and use, since different fields (stdout,
  stderr, command, etc) are all on their own line.
• Do not crash when directories can not be removed due to permission errors.
  Instead display a message to notify the users which directories could not be
  removed. These issues occurred sometimes when tests involving docker were
  run.