Save date_of_birth to person on registration

aleksis/apps/paweljong/views.py

@@ -374,6 +374,7 @@ class AccountRegisterWizardView(SessionWizardView):
                 "email": cleaned_data_register["email"],
                 "first_name": cleaned_data_register["first_name"],
                 "last_name": cleaned_data_register["last_name"],
+                "date_of_birth": cleaned_data_register["date_of_birth"],
             },
         )