* Full details:
WooCommerce Zapier Version 1.6.4 Released
* New: 'transaction_id' order data field.
* Fix: Improved compatibility with WooCommerce Subscriptions v2.1.x.
* Change: Subscription Created triggers now only use one parameter. This should minimize the likelihood of a "Serialization of 'SimpleXMLElement' is not allowed" error occurring when using "Subscription Created" trigger and the Authorize.net CIM Gateway.
