Update README.md

Author: Aurélien Ooms

README.md

@@ -6,6 +6,7 @@ let tree = RedBlackTree.from( increasing , range( 100000 ) ) ;
 ```
 
 Red-black tree library for JavaScript. See [documentation](https://aureooms.github.io/js-red-black-tree/index.html).
+Parent is [@aureooms/js-bst](https://github.com/aureooms/js-bst).
 
 [![NPM license](http://img.shields.io/npm/l/aureooms-js-red-black-tree.svg?style=flat)](https://raw.githubusercontent.com/aureooms/js-red-black-tree/master/LICENSE)
 [![NPM version](http://img.shields.io/npm/v/aureooms-js-red-black-tree.svg?style=flat)](https://www.npmjs.org/package/aureooms-js-red-black-tree)