Add external_sku to Adjustment

[joannasese]

To fetch external_sku:

$charge = new Recurly_Adjustment();
$charge->account_code = 'account_code'
$charge->unit_amount_in_cents = 5000; 
$charge->currency = 'USD';
$charge->quantity = 1;
$charge->item_code = 'item_code'
$charge->create();
print("Adjustment: $charge->external_sku");

[bhelx]

👍