chore(CHANGELOG): update to v3.3.0

Author: nikku

CHANGELOG.md

@@ -6,6 +6,10 @@ All notable changes to [dmn-js-properties-panel](https://github.com/bpmn-io/dmn-
 
 ___Note:__ Yet to be released changes appear here._
 
+## 3.3.0
+
+* `FEAT`: add `HTTL` hint ([#82](https://github.com/bpmn-io/dmn-js-properties-panel/pull/82))
+
 ## 3.2.1
 
 * `FIX`: provide correct styles file ([#65](https://github.com/bpmn-io/dmn-js-properties-panel/issues/65))