Merge pull request #43 from GrahamCampbell/patch-1

The etag from data can never be a string

Author: Nyholm

src/CachePlugin.php

@@ -435,10 +435,6 @@ private function getETag(CacheItemInterface $cacheItem)
             return;
         }
 
-        if (!is_array($data['etag'])) {
-            return $data['etag'];
-        }
-
         foreach ($data['etag'] as $etag) {
             if (!empty($etag)) {
                 return $etag;