Release notes and version updated for upcoming version 1.9.

Author: martignoni

CHANGELOG.md

@@ -3,7 +3,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/) and follow principles of [keep a changelog](http://keepachangelog.com).
 
-## Unreleased
+## Version 1.9, 2018-02-18
 ### Added
 - Moodle privacy API implementation (issue #34).
 

version.php

@@ -26,8 +26,8 @@
 
 $plugin = new stdClass();
 
-$plugin->version  = 2018021700;
-$plugin->release = '1.9-beta';
+$plugin->version  = 2018021800;
+$plugin->release = '1.9';
 $plugin->requires = 2016050400;
-$plugin->maturity = MATURITY_BETA;
+$plugin->maturity = MATURITY_STABLE;
 $plugin->component = 'tool_moodlebox';