Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:5.13/openSUSE_Tumbleweed/KDE:Qt:5.13.repo
zypper refresh
zypper install libqt5-qttools
Для openSUSE Leap 15.1 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:5.13/openSUSE_Leap_15.1/KDE:Qt:5.13.repo
zypper refresh
zypper install libqt5-qttools
Для openSUSE Leap 15.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:5.13/openSUSE_Leap_15.0/KDE:Qt:5.13.repo
zypper refresh
zypper install libqt5-qttools