Update dependencies

* 'postgresql-client' provides 'pg_receivewal', which is required by
'barman receive-wal'
* 'py3-argh' is no longer needed, it has been removed from Barman in
v2.16 (see https://github.com/EnterpriseDB/barman/blob/master/NEWS)

testing/barman/APKBUILD

@@ -7,7 +7,7 @@ pkgdesc="Backup and recovery manager for PostgreSQL"
 url="http://www.pgbarman.org"
 arch="noarch !mips64" # blocked by py3-boto3
 license="GPL-3.0-or-later"
-depends="python3 rsync py3-argcomplete py3-dateutil py3-psycopg2 py3-argh py3-boto3"
+depends="python3 rsync postgresql-client py3-argcomplete py3-dateutil py3-psycopg2 py3-boto3"
 makedepends="py3-setuptools"
 subpackages="$pkgname-doc $pkgname-bash-completion"
 pkgusers="barman"