bug#38148: [PATCH 1/2] gnu: Add python-pyqtwebengine.

[Mike Rosset]

Hello Florian

With the addition of QtWebengine into Guix. I've created some patches to
upgrade qutebrowser to 1.9.0 and to use QtWebengine by default.

And Guix is now using Qt 5.12.6 which is not to bad.

I hope this leads to less error reports for you. Once this gets merged
in.

Regards,

Mike