refactoring on Articles, minor fixes

config/invoices.php

@@ -6,12 +6,12 @@ return [
         /*
          * Carbon date format
          */
-        'format' => 'Y-m-d',
+        'format' => 'd/m/Y',
 
         /*
          * Due date for payment since invoice's date.
          */
-        'pay_until_days' => 7,
+        'pay_until_days' => 30,
     ],
 
     'serial_number' => [
@@ -87,7 +87,7 @@ return [
          * Default attributes for Seller::class
          */
         'attributes' => [
-            'name'          => 'Towne, Smith and Ebert',
+            'name'          => 'Jardin\'Envie',
             'address'       => '89982 Pfeffer Falls Damianstad, CO 66972-8160',
             'code'          => '41-1985581',
             'vat'           => '123456789',