feat:reset config

@@ -4,7 +4,7 @@ use Lackoxygen\ExceptionPush\Agents\{Ding, Wx};
 
 return [
     'agents' => [
-        Wx::class  => [
+        Wx::class      => [
             'key' => '', 'enable' => false
         ], Ding::class => [
             'token' => '', 'secret' => '', 'enable' => false
@@ -16,7 +16,6 @@ return [
     ],
 
     'callbacks' => [
-        'formatter'  => function (\Lackoxygen\ExceptionPush\Attribute\Context $context) { },
-        'dispatcher' => function () { }
+        'formatter' => null, 'dispatcher' => null
     ]
 ];