Publish raw ES Modules without flow typings

[TheLarkInn]

Currently today all of your users (using webpack or other bundlers) are consuming 92kb of transmute. This is because the output target currently for your code (based on your babelrc) is CommonJS.

You can fix this by adding "modules": false for your preset: env options. Here is a link for the full documentation on the preset.

Attached above are examples of a webpack 4 build attempting to consume this library however pulling much more code then is actually needed. Since JavaScript is the most expensive resource to parse, its vital to only consume what you need. 😍

By doing this, webpack 2+ will be able to treeshake modules more effectively, and as of webpack +4, will be able to Scope Hoist and use our sideEffects: false feature to reduce the cost of using one export to roughly around 1-2kb instead of 92kb.

Here is a stack overflow response from me that explains the features and why: https://stackoverflow.com/questions/49160752/what-does-webpack-4-expect-from-a-package-with-sideeffects-false/49203452#49203452

@aem