API Updates

lib/Invoice.php

@@ -87,6 +87,7 @@
  * @property null|string $number A unique, identifying string that appears on emails sent to the customer for this invoice. This starts with the customer's unique invoice_prefix if it is specified.
  * @property null|string|\Stripe\Account $on_behalf_of The account (if any) for which the funds of the invoice payment are intended. If set, the invoice will be presented with the branding and support information of the specified account. See the <a href="https://stripe.com/docs/billing/invoices/connect">Invoices with Connect</a> documentation for details.
  * @property bool $paid Whether payment was successfully collected for this invoice. An invoice can be paid (most commonly) with a charge or with credit from the customer's account balance.
+ * @property bool $paid_out_of_band Returns true if the invoice was manually marked paid, returns false if the invoice hasn't been paid yet or was paid on Stripe.
  * @property null|string|\Stripe\PaymentIntent $payment_intent The PaymentIntent associated with this invoice. The PaymentIntent is generated when the invoice is finalized, and can then be used to pay the invoice. Note that voiding an invoice will cancel the PaymentIntent.
  * @property \Stripe\StripeObject $payment_settings
  * @property int $period_end End of the usage period during which invoice items were added to this invoice.