chore(CHANGELOG): update to v2.1.0

Author: philippfromme

CHANGELOG.md

@@ -6,6 +6,10 @@ All notable changes are documented here. We use [semantic versioning](http://sem
 
 ___Note:__ Yet to be released changes appear here._
 
+## 2.1.0
+
+* `FEAT`: add plugin functionality to allow custom tabs and links ([#40](https://github.com/camunda/task-testing/pull/40))
+
 ## 2.0.1
 
 * `FIX`: do not show error banner action if `onConfigureConnection` not provided ([#66](https://github.com/camunda/task-testing/pull/66))