chore: update node lts version

Author: achingbrain

README.md

@@ -10,7 +10,7 @@ IPFS unixFS Engine
 [![Dependency Status](https://david-dm.org/ipfs/js-ipfs-unixfs-engine.svg?style=flat-square)](https://david-dm.org/ipfs/js-ipfs-unixfs-engine)
 [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/feross/standard)
 ![](https://img.shields.io/badge/npm-%3E%3D3.0.0-orange.svg?style=flat-square)
-![](https://img.shields.io/badge/Node.js-%3E%3D6.0.0-orange.svg?style=flat-square)
+![](https://img.shields.io/badge/Node.js-%3E%3D8.0.0-orange.svg?style=flat-square)
 
 > JavaScript implementation of the layout and chunking mechanisms used by IPFS to handle Files