Adopt Laravel coding style

Shift automatically applies the Laravel coding style - which uses the PSR-2 coding style as a base with some minor additions.

You may customize the adopted coding style by adding your own [PHP CS Fixer][1] `.php_cs` config file to your project root. Feel free to use [Shift's Laravel ruleset][2] to help you get started.

[1]: https://github.com/FriendsOfPHP/PHP-CS-Fixer
[2]: https://gist.github.com/laravel-shift/cab527923ed2a109dda047b97d53c200

app/Events/CheckoutableCheckedIn.php

@@ -25,8 +25,8 @@ class CheckoutableCheckedIn
     {
         $this->checkoutable = $checkoutable;
         $this->checkedOutTo = $checkedOutTo;
-        $this->checkedInBy  = $checkedInBy;
-        $this->note         = $note;
-        $this->action_date  = $action_date ?? date('Y-m-d');
+        $this->checkedInBy = $checkedInBy;
+        $this->note = $note;
+        $this->action_date = $action_date ?? date('Y-m-d');
     }
 }