Log Message:
py-imapclient: updated to 2.2.0

Version 2.2.0
=============

Changed
-------
- Performance improvements
  - 2x faster _maybe_int_to_bytes for Python 2
  - Fix _proc_folder_list quadratic runtime
  - Faster utf7 encode. ~40% faster for input with a mix of unicode and
    ASCII chars.
  - Cache regex in _process_select_response
- poll() when available to surpass 1024 file descriptor limit with select()
- Use next instead of six.next as imapclient doesn't claim Python 2.5 support.
- Moved "Logged in/out" traces from INFO to DEBUG level
- Run tests on Python 3.8 and 3.9
- Support the Deleted special folder used by Outlook
- Clean up timeout handling
- Run the Black code formatter over the entire project

Added
-----
- MULTIAPPEND and LITERAL+ support
- Use ptpython for interactive shell if available
- Allow any custom SASL mechanism to be provided. This allows mechanisms such
  as EXTERNAL, GSSAPI or SCRAM-SHA-256 to be used in the same way as with
  imaplib.
- Add SASL OAUTHBEARER support
- add optional timeout parameter to IMAP4_TLS.open

Fixed
-----
- fixed special folder searching
- Catch the right exception in folder_status
- test_imapclient: Fix LoggerAdapter version check
- Fix config file parsing for None attributes
- Fix useless ref cycle in lexer
- Protocol parsing: Prevent converting numbers with leading zeroes to int.
- Prevent UnicodeDecodeError in IMAPlibLoggerAdapter
- Fix invalid string escape sequences
- Ensure timeout is used on Python 2.7.  _create_socket isn't used with the
  Python 2 version of imaplib so the open method has been overrided to make it
  consistent across Python version.
- Fix IMAP4_TLS for imaplib in Python 3.9+