Set empty string as default value (#161)

Author: herpaderpaldent

src/Storage/LaravelCacheStorage.php

@@ -26,7 +26,7 @@ public function __construct(Cache $cache)
     public function fetch($key)
     {
         try {
-            $cache = unserialize($this->cache->get($key));
+            $cache = unserialize($this->cache->get($key, ''));
             if ($cache instanceof CacheEntry) {
                 return $cache;
             }
@@ -70,7 +70,7 @@ public function delete($key)
     {
         return $this->cache->forget($key);
     }
-    
+
     protected function getLifeTime(CacheEntry $data)
     {
         $version = app()->version();