Closes #4645: Update minimum required version of PostgreSQL to 9.6

docs/index.md

@@ -49,7 +49,7 @@ NetBox is built on the [Django](https://djangoproject.com/) Python framework and
 | HTTP service       | nginx or Apache   |
 | WSGI service       | gunicorn or uWSGI |
 | Application        | Django/Python     |
-| Database           | PostgreSQL 9.4+   |
+| Database           | PostgreSQL 9.6+   |
 | Task queuing       | Redis/django-rq   |
 | Live device access | NAPALM            |
 

docs/installation/1-postgresql.md

@@ -3,7 +3,7 @@
 This section entails the installation and configuration of a local PostgreSQL database. If you already have a PostgreSQL database service in place, skip to [the next section](2-redis.md).
 
 !!! warning
-    NetBox requires PostgreSQL 9.4 or higher. Please note that MySQL and other relational databases are **not** supported.
+    NetBox requires PostgreSQL 9.6 or higher. Please note that MySQL and other relational databases are **not** supported.
 
 The installation instructions provided here have been tested to work on Ubuntu 18.04 and CentOS 7.5. The particular commands needed to install dependencies on other distributions may vary significantly. Unfortunately, this is outside the control of the NetBox maintainers. Please consult your distribution's documentation for assistance with any errors.
 
@@ -51,7 +51,7 @@ At a minimum, we need to create a database for NetBox and assign it a username a
 
 ```no-highlight
 # sudo -u postgres psql
-psql (9.4.5)
+psql (10.10)
 Type "help" for help.
 
 postgres=# CREATE DATABASE netbox;

docs/release-notes/version-2.8.md

@@ -2,6 +2,8 @@
 
 v2.8.5 (FUTURE)
 
+**Note:** The minimum required version of PostgreSQL is now 9.6.
+
 ### Bug Fixes
 
 * [#3304](https://github.com/netbox-community/netbox/issues/3304) - Fix caching invalidation issue related to device/virtual machine primary IP addresses