postgresql: security bump to version 10.6

Fixes the following security issue:

CVE-2018-16850: SQL injection in pg_upgrade and pg_dump, via CREATE TRIGGER
...  REFERENCING

For more details, see the advisory:

https://www.postgresql.org/about/news/1905/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/postgresql/postgresql.hash

@@ -1,5 +1,5 @@
-# From https://ftp.postgresql.org/pub/source/v10.5/postgresql-10.5.tar.bz2.sha256
-sha256	6c8e616c91a45142b85c0aeb1f29ebba4a361309e86469e0fb4617b6a73c4011	postgresql-10.5.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v10.6/postgresql-10.6.tar.bz2.sha256
+sha256	68a8276f08bda8fbefe562faaf8831cb20664a7a1d3ffdbbcc5b83e08637624b	postgresql-10.6.tar.bz2
 
 # License file, Locally calculated
 sha256	24cfc70cf16b3a23242c49ffce39510683bdd48cbedb8a46fe03976ee5f5c21e	COPYRIGHT

package/postgresql/postgresql.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 10.5
+POSTGRESQL_VERSION = 10.6
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = http://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL