Move exception to Common namespace

composer.json

@@ -23,12 +23,12 @@
     },
     "autoload": {
         "psr-4": {
-            "Http\\Client\\Common\\Plugin\\": "src/"
+            "Http\\Client\\Common\\": "src/"
         }
     },
     "autoload-dev": {
         "psr-4": {
-            "spec\\Http\\Client\\Common\\Plugin\\": "spec/"
+            "spec\\Http\\Client\\Common\\": "spec/"
         }
     },
     "scripts": {

src/CachePlugin.php → src/Plugin/CachePlugin.php

@@ -3,13 +3,13 @@
 namespace Http\Client\Common\Plugin;
 
 use Http\Client\Common\Plugin;
+use Http\Client\Common\RewindStreamException;
 use Http\Message\StreamFactory;
 use Http\Promise\FulfilledPromise;
 use Psr\Cache\CacheItemInterface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
-use RewindStreamException;
 use Symfony\Component\OptionsResolver\Options;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 

src/RewindStreamException.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Http\Client\Common\Plugin;
+namespace Http\Client\Common;
 
 use Http\Client\Exception;