new releases of libQApt and Muon

[Carlo Vanini]

New releases of libqapt, a Qt wrapper library for Debian's libaptpkg,
and of Muon Package Manager are available from the respective links
below.

https://download.kde.org/stable/libqapt/3.0.3/src/libqapt-3.0.3.tar.xz.mirrorlist

https://download.kde.org/stable/muon/5.7.0/src/muon-5.7.0.tar.xz.mirrorlist

Changes in libqapt 3.0.3

- Reopen xapian index after update in order to use updated info.
- Fix incorrect markup usage in some UI message boxes.
- Fix removal of leading whitespace in package description, that in
some cases resulted in a missing character. (BKO: #316650)
- Fix missing include <random>.

Changes in Muon 5.7.0

- Features:
  * Add columns for Installed-Size, Version and Available-Version.
(BKO: #332453)
- Bugfixes:
  * Fix sort order indicator for search results. (BKO: #313596)
  * Hide purge button when a package is already marked for change.
  * Show error message if software-properties-kde cannot be found.
(BKO: #366590)
  * Refresh current search results when xapian update is done. (BKO: #362047)