The default import is replaced with only polyfills that are Stage 4; this is in alignment with how we have removed the Stage presets. This also would mean we would need to add new imports when necessary, but that can be in a future release.
@babel/polyfill
Provides polyfills necessary for a full ES2015+ environment
See our website @babel/polyfill for more information or the issues associated with this package.
Install
Using npm:
npm install --save-dev @babel/polyfill
or using yarn:
yarn add @babel/polyfill --dev