[neon-notifications] Dev Required: pyqt5 - 5.15.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_forks_pyqt5/169/display/redirect

#<Debian::UScan::DEHS::Package:0x0000556b635db820 @name="pyqt5", @debian_uversion="5.14.1+dfsg", @debian_mangled_uversion="5.14.1", @upstream_version="5.15.3", @upstream_url="https://pypi.debian.net/PyQt5/PyQt5-5.15.3.tar.gz", @status="Newer version available">