missing `.finally()`

[espretto]

Hi,
This is a problem.

hypernova/src/environment.js

Line 5 in 3d7609a

const es6methods = ['then', 'catch', 'constructor'];

[ljharb]

It's called "es6 methods" and finally isn't in ES6, but I agree that finally should be added to that list. es6StaticMethods is also missing allSettled and any.

A better fix, though, is removing use of Bluebird entirely.

[espretto]

duplicate of #183