[neon-notifications] Dev Required: cask-server - 0.6.6

[Neon CI]

https://build.neon.kde.org/job/watcher_release_neon-packaging_cask-server/20/display/redirect

#<Debian::UScan::DEHS::Package:0x0000558beed1b918 @name="cask-server", @debian_uversion="0.2.5", @debian_mangled_uversion="0.2.5", @upstream_version="0.6.6", @upstream_url="https://github.com/Nitrux/cask-server/archive/refs/tags/v0.6.6.tar.gz", @status="Newer version available">