Codegen for openapi v154 (#1302)

OPENAPI_VERSION

@@ -1 +1 @@
-v153
+v154

lib/Price.php

@@ -29,6 +29,7 @@
  * @property string $billing_scheme Describes how to compute the price per period. Either <code>per_unit</code> or <code>tiered</code>. <code>per_unit</code> indicates that the fixed amount (specified in <code>unit_amount</code> or <code>unit_amount_decimal</code>) will be charged per unit in <code>quantity</code> (for prices with <code>usage_type=licensed</code>), or per unit of total usage (for prices with <code>usage_type=metered</code>). <code>tiered</code> indicates that the unit pricing will be computed using a tiering strategy as defined using the <code>tiers</code> and <code>tiers_mode</code> attributes.
  * @property int $created Time at which the object was created. Measured in seconds since the Unix epoch.
  * @property string $currency Three-letter <a href="https://www.iso.org/iso-4217-currency-codes.html">ISO currency code</a>, in lowercase. Must be a <a href="https://stripe.com/docs/currencies">supported currency</a>.
+ * @property null|\Stripe\StripeObject $custom_unit_amount When set, provides configuration for the amount to be adjusted by the customer during Checkout Sessions and Payment Links.
  * @property bool $livemode Has the value <code>true</code> if the object exists in live mode or the value <code>false</code> if the object exists in test mode.
  * @property null|string $lookup_key A lookup key used to retrieve prices dynamically from a static string. This may be up to 200 characters.
  * @property \Stripe\StripeObject $metadata Set of <a href="https://stripe.com/docs/api/metadata">key-value pairs</a> that you can attach to an object. This can be useful for storing additional information about the object in a structured format.