add Changelog for v1.7.3

Author: xujiajun

docs/CHANGELOG.md

@@ -52,4 +52,9 @@
 
 ## v1.7.2 (2017-10-20)
 * optimize ConfigService
-* add cache command for route&config
+* add cache command for route&config
+
+## v1.7.3 (2017-10-20)
+* Merge pull request #15 from akiyamaSM/patch-2
+* Fixed when no app.yml file error
+* move register debugbar code to WhoopsExceptionsHandler

src/Framework/Kernel.php

@@ -67,7 +67,7 @@ class Kernel extends Container
     public function __construct(array $values = [])
     {
         $start = microtime(true);
-        $this['version'] = 'v1.7.2';
+        $this['version'] = 'v1.7.3';
         $this['start_time'] = $start;
         self::$instance = $this;
         parent::__construct($values);