add Changelog for v1.7.2

Author: xujiajun

docs/CHANGELOG.md

@@ -48,4 +48,8 @@
 * clean code for kernel Listener && remove business logic Listeners (src/Framework/Listener/MailListener.php、src/Framework/Listener/MiddlewareListener.php)
 
 ## v1.7.1 (2017-10-17)
-* add register kernel listeners&&ServiceProvider wrapper
+* add register kernel listeners&&ServiceProvider wrapper
+
+## v1.7.2 (2017-10-20)
+* optimize ConfigService
+* add cache command for route&config

src/Framework/Kernel.php

@@ -67,7 +67,7 @@ class Kernel extends Container
     public function __construct(array $values = [])
     {
         $start = microtime(true);
-        $this['version'] = 'v1.7.1';
+        $this['version'] = 'v1.7.2';
         $this['start_time'] = $start;
         self::$instance = $this;
         parent::__construct($values);