Style and fix version for test

Author: Nyholm

composer.json

@@ -33,12 +33,12 @@
         "psr/cache":            "1.0.0",
         "cache/adapter-common": "^0.2",
         "cache/taggable-cache": "^0.3",
-        "cache/hierarchical-cache": "^0.1"
+        "cache/hierarchical-cache": "^0.2"
     },
     "require-dev":
     {
         "phpunit/phpunit":         "^5.1|^4.0",
-        "cache/integration-tests": "dev-master"
+        "cache/integration-tests": "^0.7"
     },
     "provide":
     {

src/RedisCachePool.php

@@ -39,7 +39,7 @@ public function __construct(\Redis $cache)
     protected function fetchObjectFromCache($key)
     {
         if (false === $result = unserialize($this->cache->get($this->getHierarchyKey($key)))) {
-           return [false, null];
+            return [false, null];
         }
 
         return $result;
@@ -62,7 +62,7 @@ protected function clearOneObjectFromCache($key)
 
     protected function storeItemInCache($key, CacheItemInterface $item, $ttl)
     {
-        $key = $this->getHierarchyKey($key);
+        $key  = $this->getHierarchyKey($key);
         $data = serialize([true, $item->get()]);
         if ($ttl === null) {
             return $this->cache->set($key, $data);