[neon-notifications] ksmtp new version 18.12.2

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_ksmtp/269/display/redirect

#<Debian::UScan::DEHS::Package:0x000055751d873ee8 @name="ksmtp", @debian_uversion="18.12.1", @debian_mangled_uversion="18.12.1", @upstream_version="18.12.2", @upstream_url="http://download.kde.internal.neon.kde.org/stable/applications/18.12.2/src/ksmtp-18.12.2.tar.xz", @status="Newer version available">