Add safe drop enabled flag

Author: joshbmarshall

src/Parcel.php

@@ -37,6 +37,7 @@ class Parcel {
     public $value;
     public $contains_dangerous_goods = false;
     public $authority_to_leave = false;
+    public $safe_drop_enabled = true;
     public $allow_partial_delivery = true;
     public $packaging_type;
     public $atl_number;

src/Shipment.php

@@ -150,7 +150,9 @@ public function lodgeShipment() {
                 'height'         => $parcel->height,
                 'width'          => $parcel->width,
                 'weight'         => $parcel->weight,
+                'contains_dangerous_goods' => $parcel->contains_dangerous_goods,
                 'authority_to_leave' => $parcel->authority_to_leave,
+                'safe_drop_enabled' => $parcel->safe_drop_enabled,
                 'allow_partial_delivery' => $parcel->allow_partial_delivery,
             ];
             if ($parcel->value) {