Warnings due to the bump to PHP 8.*

[stephane-gillot]

`FILE: /Users/sgillot/Documents/Projets_github/cmp-website/web/app/plugins/sender/inc/libs/wordpress-settings-api/class.settings-api.php

FOUND 1 ERROR AFFECTING 1 LINE

109 | ERROR | Function create_function() is deprecated since PHP 7.2 and removed since PHP 8.0; Use an anonymous function instead`

I updated the version of 2 libraries in the branch issue/81185 and re-added the custom line that included the rules.