[neon-notifications] kdenlive new version 19.04.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_forks_kdenlive/401/display/redirect

#<Debian::UScan::DEHS::Package:0x0000559ea376ec28 @name="kdenlive", @debian_uversion="18.12.3", @debian_mangled_uversion="18.12.3", @upstream_version="19.04.0", @upstream_url="http://download.kde.internal.neon.kde.org/stable/applications/19.04.0/src/kdenlive-19.04.0.tar.xz", @status="Newer version available">