Prepare release 3.2.0

CHANGELOG.md

 ## Changelog
 
+### 3.2.0
+  * Warn instead of failing if the FR version is not 3.x
+  * Update logrotate module dependency
+  * Add PostgreSQL support
+  * Fix bug with templating home servers in Puppet 4
+  * Fix bug with logrotate postrotate on non Red Hat distros
+
 ### 3.1.0
   * Provide facility to enable/disable specific EAP types in `freeradius::module::eap`
 

metadata.json

 {
   "name": "jgazeley-freeradius",
-  "version": "3.1.0",
+  "version": "3.2.0",
   "author": "jgazeley",
   "summary": "Install and configure FreeRADIUS",
   "license": "Apache-2.0",