Update module github.com/coreos/go-systemd/v22 to v22.5.0

See merge request !3

Update module gopkg.in/yaml.v3 to v3.0.1

See merge request !7

Fix some issues reported by lintian

See merge request !5

Changes-By: lintian-brush
Fixes: lintian: missing-built-using-field-for-golang-package
See-also: https://lintian.debian.org/tags/missing-built-using-field-for-golang-package.html

Changes-By: lintian-brush
Fixes: lintian: uses-debhelper-compat-file
See-also: https://lintian.debian.org/tags/uses-debhelper-compat-file.html

Changes-By: lintian-brush
Fixes: lintian: package-uses-old-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html

Changes-By: lintian-brush
Fixes: lintian: trailing-whitespace
See-also: https://lintian.debian.org/tags/trailing-whitespace.html

Update module coreos/go-systemd/v22 to v22.2.0

See merge request ai3/tools/postfix-policyd-proxy!2

Configure Renovate

See merge request ai3/tools/postfix-policyd-proxy!1