This update for keepassxc fixes the following issues:

- Update to version 2.6.0:
  * https://keepassxc.org/blog/2020-07-07-2.6.0-released/
  * https://github.com/keepassxreboot/keepassxc/releases/tag/2.6.0

This update was imported from the openSUSE:Leap:15.2:Update update project.