Python FTP server library provides a high-level portable interface to
easily write very efficient, scalable and asynchronous FTP servers with
Python.
What's new
==========
**Enhancements**
* #621: use black formatter.
* #626: use argparse instead of deprecated optparse.
* #628: use pytest instead of unittest.
* #632: add ability to run tests in parallel with `make test-parallel`.
**Bug fixes**
* #627: PermissionError may occur on Windows when binding ports from a
pre-configured PASV range.