update changelog

Author: tw2113

README.txt

@@ -82,6 +82,12 @@ You've connected your WooCommerce store to Constant Contact, promoted your WooCo
 [Learn more with our step-by-step revenue reporting guide.](https://knowledgebase.constantcontact.com/articles/KnowledgeBase/36892-View-Recovered-Revenue-from-the-WooCommerce-Abandoned-Cart-Reminder-Email?q=woocommerce*&lang=en_US)
 
 == Changelog ==
+
+= 2.1.0 =
+* Added - Logging to help troubleshoot potential issues.
+* Updates - Store a bit more customer information for abandoned cart reachout purposes.
+* Updates - URLs used during the connection process and account associations.
+
 = 2.0.3 =
 
 * Fix - Minor design fixes, bug fixes and stability improvements.