update namespace

Author: JanHuang

composer.json

@@ -12,7 +12,7 @@
     },
     "autoload": {
         "psr-4": {
-            "ServiceProvider\\": "src"
+            "FastD\\Viewer\\": "src"
         },
         "files": [
             "helpers.php"

src/ViewServiceProvider.php renamed to src/Viewer.php

@@ -7,7 +7,7 @@
  * @see      http://www.fast-d.cn/
  */
 
-namespace ServiceProvider;
+namespace FastD\Viewer;
 
 
 use FastD\Container\Container;
@@ -19,7 +19,7 @@
  * Class ViewServiceProvider
  * @package ServiceProvider
  */
-class ViewServiceProvider implements ServiceProviderInterface
+class Viewer implements ServiceProviderInterface
 {
     /**
      * @param Container $container