Wrong phone number clean at order import

[JulesLeynaud]

plugin-magento2/Model/Import/Customer.php

Line 774 in 6a3c014

return preg_replace('/[^0-9]*/', '', $phoneNumber);

Hello,
This regex remove the "+" of the country calling code of the phone during order import.
Exemple "+336123456789" is stored in magento as "336123456789" wich is a wrong phone number.

A quick fix could be :

return preg_replace('/[^0-9+]*/', '', $phoneNumber);

But a more precise clean of the phone number could be better.

Thanks