v<0.9.3>, <08/19/2021> -- Expand test to Python 3.8 and 3.9. v<0.9.3>, <08/29/2021> -- Add SUOD.

In this version, SUOD is integrated into PyOD, and fast training/prediction is therefore possible. See https://github.com/yzhao062/pyod/blob/master/examples/suod_example.py for more information.