chore(CHANGELOG): update to v0.6.0

Author: nikku

CHANGELOG.md

@@ -6,10 +6,13 @@ All notable changes to [diffpatch](https://github.com/bpmn-io/diffpatch) are doc
 
 ___Note:__ Yet to be released changes appear here._
 
+## 0.6.0
+
 * `CHORE`: make ESM only module
 * `CHORE`: move library to `lib`
 * `CHORE`: dependency bumps
 * `CHORE`: drop `formatters` main export
+* `CHORE`: make `diff-match-patch` an optional dependency ([#352](https://github.com/benjamine/jsondiffpatch/pull/352))
 
 ## ...