Avoid sending telephone = false

[alexsegura]

When sending false for the telephone, the API rejects the delivery.

Need to send null, or not add the key at all.

coopcycle-plugins/prestashop/coopcycle.php

Lines 665 to 667 in 4c5dad2

	if ($address->phone || $address->phone_mobile) {
	$payload['dropoff']['address']['telephone'] = $address->phone ? $address->phone : $address->phone_mobile;
	}