Update README.md

Author: CarlosNZ

README.md

@@ -709,6 +709,7 @@ This component is heavily inspired by [react-json-view](https://github.com/mac-s
 
 ## Changelog
 
+- **1.17.0**: `defaultValue` function takes the new `key` as second parameter
 - **1.16.0**: Extend the "click" zone for collapsing nodes to the header bar and left margin (not just the collapse icon)
 - **1.15.12**:
   - [Custom buttons](#custom-buttons)