Extract fix

Author: sebastiandedeyne

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 All notable changes to `laravel-collection-macros` will be documented in this file
 
+## 2.3.1 - 2017-07-11
+- Fixed: `extract` now returns an instance of the current collection type
+
 ## 2.3.0 - 2017-07-11
 - Added: `extract`
 

src/macros.php

@@ -361,6 +361,6 @@
             return $extracted->push(
                 data_get($this->items, $key)
             );
-        }, new self());
+        }, new static());
     });
 }