PHP8 support

Hey everybody,
are you going to make your plugin PHP8 ready in the near future?

for example you should upgrade phpmailer version:

Uncaught Error: Call to undefined function get_magic_quotes_runtime() in wp-content/plugins/mailster/classes/libs/phpmailer/class.phpmailer.php:2697
Stack trace:

or fix this one:

Ein Fehler vom Typ E_ERROR wurde in der Zeile 858 der Datei wp-content/plugins/mailster/classes/UpdateCenterPlugin.php verursacht. Fehlermeldung: Uncaught Error: Attempt to modify property "response" on bool in wp-content/plugins/mailster/classes/UpdateCenterPlugin.php:858
Stack trace:
#0 wp-includes/class-wp-hook.php(294): UpdateCenterPlugin->update_plugins_filter()
#1 wp-includes/plugin.php(212): WP_Hook->apply_filters()
#2 wp-includes/option.php(1899): apply_filters()
#3 wp-includes/update.php(701): get_site_transient()
#4 wp-admin/update-core.php(1077): wp_get_update_data()
#5 {main}
  thrown