* Move to ESM and drop Babel transpiling
* Make the activestorage JS directly available through the asset pipeline as a precompiled asset
* Use example with direct attachment
* Explain that direct reference is possible
* Active Storage JS is a module
* Retain umd asset for backwards compatibility, add ESM file in addition
* Explain how to use activestorage.esm with importmap
* Use untranspiled activestorage inclusion
* Don't repeat terser options
