Use array_unique instead of multiple ifs

Author: acrobat

src/CachePlugin.php

@@ -86,12 +86,9 @@ public static function clientCache(CacheItemPoolInterface $pool, StreamFactory $
     {
         // Allow caching of private requests
         if (isset($config['respect_response_cache_directives'])) {
-            if (!in_array('no-cache', $config['respect_response_cache_directives'], true)) {
-                $config['respect_response_cache_directives'][] = ['no-cache'];
-            }
-            if (!in_array('max-age', $config['respect_response_cache_directives'], true)) {
-                $config['respect_response_cache_directives'][] = ['max-age'];
-            }
+            $config['respect_response_cache_directives'][] = 'no-cache';
+            $config['respect_response_cache_directives'][] = 'max-age';
+            array_unique($config['respect_response_cache_directives']);
         } else {
             $config['respect_response_cache_directives'] = ['no-cache', 'max-age'];
         }