To stay with maintained versions the used libraries should be updated for the next major release.
Qt to 5.10.1 and KDE Frameworks to 5.43.0.
This has a regression risk but at some point we need to take this risk.
The update was done with rev: 415184071dec425e7cd07b4580bd2434a5f48ade e30032757a3f6add4de576e0e4affcba420dcdeb