add postgresql-10 alternative

debian/control

@@ -2,8 +2,8 @@ Source: dak
 Section: misc
 Priority: extra
 Build-Depends: debhelper (>= 9~),
-               postgresql-9.6 | postgresql-9.4,
-               postgresql-9.6-debversion | postgresql-9.4-debversion,
+               postgresql-10 | postgresql-9.6 | postgresql-9.4,
+               postgresql-10-debversion | postgresql-9.6-debversion | postgresql-9.4-debversion,
                python-all-dev,
                python-apt,
                python-debian,

integration-tests/run-tests

@@ -9,7 +9,7 @@ set -u
 #   returns: version, e.g. "9.6"
 find-postgresql-version() {
   local status
-  for v in 9.6 9.4; do
+  for v in 10 9.6 9.4; do
     status=$(dpkg-query \
              -f'${db:Status-Status} ' \
              -W postgresql-${v} postgresql-${v}-debversion 2>/dev/null || :)