Dynamic Properties warning in PHP 8.3

[dragonfly4]

Describe the bug
Use custom properties in the Party class object

To Reproduce
DEPRECATED Creation of dynamic property LaravelDaily\Invoices\Classes\Party::$invoice_rpr is deprecated in vendor/laraveldaily/laravel-invoices/src/Classes/Party.php on line 23.

Expected behavior
Should not give a warning

[dragonfly4]

PR #252 created to resolve this