• #288: Add database dump hook for MongoDB.
• #470: Move mysqldump options to the beginning of the command due to MySQL bug 30994.
• #471: When command-line configuration override produces a parse error, error cleanly instead of
  tracebacking.
• #476: Fix unicode error when restoring particular MySQL databases.
• Drop support for Python 3.6, which has been end-of-lifed.
• Add support for Python 3.10.