[neon-notifications] parley new version 18.12.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_parley/317/display/redirect

#<Debian::UScan::DEHS::Package:0x00005579b2890f68 @name="parley", @debian_uversion="18.12.2", @debian_mangled_uversion="18.12.2", @upstream_version="18.12.3", @upstream_url="http://download.kde.internal.neon.kde.org/stable/applications/18.12.3/src/parley-18.12.3.tar.xz", @status="Newer version available">