update changelog

Author: thomas-kl1

CHANGELOG.md

@@ -2,6 +2,20 @@
 
 All notable changes to this publication will be documented in this file.
 
-## 1.0.0 - 2020-12-06
+## 2.1.0 - 2020-12-06
+- Include the Zcrm OAuth codebase into the package due to the Zoho team who archived the zcrm package
 
-First stable release.
+## 2.0.0 - 2020-06-29
+- Fix invalid type returned by `getEntityId` in `AbstractDataObject`
+- Fix a false-positive error when there is no results in the API response
+- Open the operation pool in the gateway facade and remove delegated methods
+- Add the list entities operation
+
+## 1.0.2 - 2020-06-26
+- Add verbose in the error messages
+
+## 1.0.1 - 2020-06-16
+- Remove the `zcrmsdk\crm` dependency in the oauth client initialization
+
+## 1.0.0 - 2020-06-12
+- First stable release.