default limit to null

Author: taylorotwell

config/hashing.php

@@ -31,7 +31,7 @@
     'bcrypt' => [
         'rounds' => env('BCRYPT_ROUNDS', 12),
         'verify' => env('HASH_VERIFY', true),
-        'limit' => env('BCRYPT_LIMIT', 72),
+        'limit' => env('BCRYPT_LIMIT', null),
     ],
 
     /*