Version 2.0.0

Added

• stats command: Added new option switch -H/--human.
• stats command: Added new option switch --reverse to reverse the sort
  order.

Changed

• BREAKING: Message sizes are now output in bytes by default. This also
  applies to CSV output. Use the new -H/--human switch to convert byte
  counts to SI-prefixed numbers.
• BREAKING: The sort properties q1 and q3 have been renamed to q1_size
  and q3_size.
• Output: Draw table borders in blue for better visual separation.
• Output: Draw a separator line above the 'total' row.
• Updated dependencies.

Fixed

• stats command: Sort did not work at all.
• Do not crash when collecting stats for mailboxes with a very large number of
  messages. Closes Github issue #8.

Removed

• BREAKING: Removed the -O switch to reverse the sort order as it did not
  work as intended