- laravel framework upgrade frpm 7.x to 8. see also: https://laravel.com/docs/8.x/upgrade#assert-exact-json-method

- use  PHP7 null coalesce operator instead of laravel optional method
- change Breadcrumbs::register method to Bredcrumbs::for method
- composer updates

resources/views/workflow/review/index.blade.php

@@ -44,7 +44,7 @@
                     <td>
                         {{ $dataset->server_state }}
                     </td>                
-                    <td>editor: {{ optional($dataset->editor)->login }}</td>
+                    <td>editor: {{ $dataset->editor?->login }}</td>
                    <td>
                         {{-- @php                       
                         $dateDiff = $dataset['server_date_modified']->addDays(14);