NPM distribution missing ES module build

[petermikitsh]

The rollup config references a module build, however...

https://unpkg.com/react-event-listener@0.6.4/dist/react-event-listener.esm.js does not exist
https://unpkg.com/react-event-listener@0.6.4/dist/react-event-listener.cjs.js exists

[TrySound]

This package is used by material-ui which is distributed only with cjs. Webpack is not able to handle a few cases with cjs/esm interop. There is a solution but Oliver doesn't feel good about named exports.
#79

Default exports suck. I wish they don't exist.

[petermikitsh]

Should the module build be removed from the rollup config then?

[TrySound]

I would leave it for better times.