The package is severely out of date with respect to the Debian
Policy. Latest version is 4.6.2
and your package only follows
3.9.4...
The package has a debian/watch file, but the last attempt
to use it for checking for newer upstream versions failed with
an error:
In debian/watch no matching files for watch line https://github.com/a-nikolaev/curseofwar/tags .*/archive/(?:upstream/)?(?:v||version-|release-|X|R|r)(\d\S*)\.tar\.gz