ES6 syntax

[felipemsantana]

The usage of ES6 syntax in this lib is breaking in UglifyJS when bundling in webpack

ERROR in app-7d11380495e59eb43349.js from UglifyJs
SyntaxError: Name expected [app-7d11380495e59eb43349.js:132037,46]

And would fail to be parsed in old browsers

[searls]

What's the issue? I'd welcome a PR to fix this issue.

For what it's worth, this library is meant to support Node 6 & up and current versions of the evergreen browsers.

[felipemsantana]

It is not possible use this lib in webpack < 4
https://stackoverflow.com/questions/45870467/error-in-bundle-js-from-uglifyjs-name-expected