[xmlunit/xmlunit.net] c9aeee: yes, please upgrade

[Stefan B. <no...@gi...>]

  Branch: refs/heads/main
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: c9aeee9245ad4fca908d02a0e68dbad8f70fb012
      https://github.com/xmlunit/xmlunit.net/commit/c9aeee9245ad4fca908d02a0e68dbad8f70fb012
  Author: Stefan Bodewig <bo...@ap...>
  Date:   2023-03-14 (Tue, 14 Mar 2023)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  yes, please upgrade