- https://nodejs.org/en/blog/release/v8.0.0/
- https://medium.com/@nodejs/node-js-8-big-improvements-for-the-debugging-and-native-module-ecosystem-58454861f2fc
- https://medium.com/the-node-js-collection/ibm-intel-microsoft-mozilla-and-nodesource-join-forces-on-node-js-48e21ffb697d
- https://hackernoon.com/upgrading-from-node-6-to-node-8-a-real-world-performance-comparison-3dfe1fbc92a3
- http://2ality.com/2017/05/util-promisify.html