Merge pull request #239 from OpenConext/feature/add-symfony-4-0-0-cha…

…ngelog

Add changelog for 4.0.0

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+# 4.0.0
+From this version PHP 7.2 is supported and support for PHP 5.6 is dropped.
+
+Be aware that the new Symfony directory structure is now used. So if you are overwriting for example config files it is recommended 
+to verify the location on forehand. Also the file extensions of Yaml files are changed and some Symfony specific special characters    
+need to be escaped. 
+
+See:  https://github.com/symfony/symfony/blob/4.4/UPGRADE-4.0.md
+
+**Improvements**
+ * Upgrade to Symfony 4.4 LTS and support php 7.2 #237 
+
 ## 3.1.3
 **Bugfix**
  * Allow updating the location of an RA  #235