Use import instead of require

[timjacobi]

As pointed out in #161 if use of ES6+ is encouraged why not use the ES6 import syntax everywhere instead of require?

Happy to take this.

[ryanmcdermott]

Hey Tim! I think I want to change this example to use fs, request, and or some other async modules. The require example is throwing everyone off. If you're down for that I'll happily accept a PR!