Provide more helpful values for Object.entries() and Object.values()

[jcready]

No description provided.

[jcready]

I'm not familiar with how the tests work, and I honestly cannot figure out what I broke in the tests from Travis-CI output. If anyone can point me in the right direction I'd be more than happy to adjust any test expectations to get these tests passing.

[vkurchatkin]

Unfortunately, this is very unsound

[jcready]

Why is that?

[vkurchatkin]

Here is a simple example:

function test(val: { foo: string }) {
  Object.values(val).forEach(v => {
  	v.toLowerCase();
  });
}

test({ foo: 'x', bar: 123 });

This going to pass typechecking, but fail at runtime

[jcready]

Oh, blerg. That is truly unfortunate.

[samwgoldman]

We're slowly getting Flow to a place where we can exploit exact objects to provide more specific types for own- and width-sensitive APIs, like Object.values, object spread properties, etc. Rest assured that this is my primary focus right now.