This issue was fixed, see that now depends on -9.1:
# apt-cache show postgresql
Package: postgresql
Source: postgresql-common (143)
Version: 9.3+142really9.1+143
Installed-Size: 68
Maintainer: Debian PostgreSQL Maintainers <pkg>
Architecture: all
Depends: postgresql-9.1
Description-en: object-relational SQL database (supported version)
This metapackage always depends on the currently supported PostgreSQL
database server version.
.
PostgreSQL is a fully featured object-relational database management
system. It supports a large part of the SQL standard and is designed
to be extensible by users in many aspects. Some of the features are:
ACID transactions, foreign keys, views, sequences, subqueries,
triggers, user-defined types and functions, outer joins, multiversion
concurrency control. Graphical user interfaces and bindings for many
programming languages are available as well.
Description-md5: bdff2d6e5b2a1dd00e72b3ed8729d9ac
Tag: devel::lang:sql, interface::daemon, network::server, network::service,
role::metapackage, role::program, suite::postgresql, works-with::db
Section: database
Priority: optional
Filename: pool/main/p/postgresql-common/postgresql_9.3+142really9.1+143_all.deb
Size: 45986
MD5sum: 8568549b021c10d7aa14af31fa6ccd03
SHA1: c10b4fe9a7be49e312e597b90c165019cbd5f46b
SHA256: d78cc2f17f43e03684d7dec4f2fd113995d74c55022fc0636f4c51a84cc21f99