fix(deps): Debian package needs rsync to run, so depend on it (#1474)

Running gitlab-ci-local will fail on a system that does not have rsync.
Add it as a dependency to automatically install it if missing.

publish-deb

@@ -20,6 +20,7 @@ Maintainer: Mads Jon Nielsen <[email protected]>
 Description: ${DESCRIPTION}
 Homepage: https://github.com/firecow/gitlab-ci-local
 Website: https://github.com/firecow/gitlab-ci-local
+Depends: rsync
 EOF
 
 mkdir -p "bin/gitlab-ci-local_${VERSION}_amd64/usr/local/bin/"