Release 9.0.0

Author: thekid

ChangeLog.md

@@ -1,7 +1,9 @@
 XP Framework Core ChangeLog
 ========================================================================
 
-## 9.0.0 / ????-??-??
+## ?.?.? / ????-??-??
+
+## 9.0.0 / 2017-09-24
 
 ### Heads up!
 
@@ -34,6 +36,7 @@ XP Framework Core ChangeLog
 * Merged PR #180: Secret::equals() - @thekid
 * Added preliminary PHP 7.2.0 support - tested successfully using
   [PHP 7.2.0 Alpha 1](http://php.net/archive/2017.php#id2017-06-08-2)
+  up to [PHP 7.2.0 RC2](http://php.net/archive/2017.php#id2017-09-14-1).
   (@thekid)
 * Added `xp version runners` which will display XP runners version
   (@thekid)