Will not derive from `AggregateError`.
Will not derive from `AggregateError`.

Added a note in the readme and checked in the effort into the
`aggregate` branch. If someone shims their code with
`es-aggregate-error` the code breaks.

`Error` derived programming is already hard enough. Don't want to step
around Node.js version changes. Node.js shim libraries are lowest common
denominator and I don't want to wade into them.

Closes #116.

bigeasy/interrupt