meta-pkgs/lxqt: update to 1.3.0

General
- LXQt 1.3.0 is still based on Qt 5.15, the last LTS version of Qt5. The Qt6
  support was started (and is usable in WIP branches) but could not be
  released due to the lack of a stable KF6.
- In LXQt窶冱 file manager and its library, smooth scrolling can be switched for
  all view modes, minor issues of the Desktop mode are fixed, and handling of
  zero-sized files is improved.
- QTerminal has received small bug fixes, especially for use under Wayland.
- Support for doas has been added to lxqt-sudo.
- In LXQt Session, the detection of window manager and system tray has been
  improved.
- Translations have received many updates.
- Other changes can be found in change logs of LXQt components.

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