Convert to TypeScript

[JustinBeckwith]

BREAKING CHANGE: This module now supports es module style imports. This provides forward compatibility with TypeScript, Babel, and the new es module spec.

Old code

const DNS = require('@google-cloud/dns');
const dns = new DNS();
// OR...
const dns = require('@google-cloud/dns')();

New code

const {DNS} = require('@google-cloud/dns');
const dns = new DNS();

[fhinkel]

Rubberstamp