fixed exception namespace

Author: samuraee

README.md

@@ -23,9 +23,16 @@ php artisan vendor:publish
 
 ### Example
 ```php
+//default template from xml.php config file like: '<root></root>'
 Route::get('/', function () {
     return response()->xml(User::all());
 });
+
+
+// custom template like: '<result></result>'
+Route::get('/foo', function () {
+    return response()->xml(['foo' => 1, 'bar' => 2, 'baz' => 3], '<result></result>);
+});
 ```
 
 ## Team

src/XmlResponse/XmlResponse.php

@@ -4,7 +4,7 @@
 
 use Illuminate\Support\Facades\Response;
 use Illuminate\Container\Container;
-use Tartan\XmlResponse\Exception\XmlResponseException;
+use Joker\XmlResponse\Exception\XmlResponseException;
 
 /**
  * Class XmlResponse