Notes

Wildcard exports/imports wont normalise if export default is a non-object. See #224.

3.0.0 breaking changes

Remove allowImportExportEverywhere option from acorn.
Remove this shorthand from playground.
Remove super() inside non-constructors - add descriptive error message.
Split up ES5 getter/setter transforming and ES6 property methods into separate transformers.
Add autoindentation.
Move super transformation from classes into a separate transformer that also supports object expressions.
Prefix all fast transformers with fast, make them declare that they're a fast transformer similar to optional transformers and add a --fast flag to enable them all.