"export default" syntax for main package export breaks non-es2015 consumers

[euwest]

:sadpanda:

tl;dr: export default <thing> transpiles into a module that, when importing via commonJS(i.e. in a node environment), means you have to var thing = require('thing').default();

[LionOps]

If it's important, we can use https://babeljs.io/docs/plugins/transform-es2015-modules-commonjs/