2.0.0

A couple of breaking changes required a major version bump.

1. Dropped official support for node v6. The package should still work, but we can no longer test in our CI. #57
2. Removed hack to be backward compatible with the way gulp used to build our bundle. #58

The removal of the backward compatibility hack is the only one likely to impact users, and it should be extremely minor. The fix is to convert from:

const libhoney = require("libhoney").default;

to

const libhoney = require("libhoney");