Qt 5.15.3 does not have an official open source release, but the KDE team
maintains a collection of patches (pulled from Qt upstream) that they expect us
to carry.
This is a maintenance release of the Qt 5.15 release series. It focuses on
bug and security fixes. The feature that made me update this package was
the broken u2f support in QtWebEngine when used together with
Qutebrowser. It previously (on older Qt versions) used to work but
stopped working with the switch to 5.15.
As the changelog is rather extensive the reader is advised to inspect
[0] to checkout the changes to each of the components of their
interest.
This also fixes a security issue with QtWebEngine based browsers that
could be crashed by visiting a website that invokes certain WebRTC
features [1].
[0] https://wiki.qt.io/Qt_5.15.2_Change_Files
[1] https://bugreports.qt.io/browse/QTBUG-86752
