package/postgresql: bump version to 11.6

Fixes a large number of bugs. For details, see:
https://www.postgresql.org/about/news/1994/
https://www.postgresql.org/docs/11/release-11-6.html

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

package/postgresql/postgresql.hash

@@ -1,7 +1,7 @@
-# From https://ftp.postgresql.org/pub/source/v11.5/postgresql-11.5.tar.bz2.md5
-md5 580da94f6d85046ff2a228785ab2cc89  postgresql-11.5.tar.bz2
-# From https://ftp.postgresql.org/pub/source/v11.5/postgresql-11.5.tar.bz2.sha256
-sha256 7fdf23060bfc715144cbf2696cf05b0fa284ad3eb21f0c378591c6bca99ad180  postgresql-11.5.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v11.6/postgresql-11.6.tar.bz2.md5
+md5 8e3462b342caf6f2265126674dde26da  postgresql-11.6.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v11.6/postgresql-11.6.tar.bz2.sha256
+sha256 49924f7ff92965fdb20c86e0696f2dc9f8553e1563124ead7beedf8910c13170  postgresql-11.6.tar.bz2
 
 # License file, Locally calculated
 sha256	c4c86d683970b22b9fab53320ee1b3a30ef4e8223122b4fb6be53ea62ecee8b3  COPYRIGHT

package/postgresql/postgresql.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 11.5
+POSTGRESQL_VERSION = 11.6
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = https://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL