Replace __proto__ references with inherits module

[ndhoule]

cc @boneskull @jbnicolai

Resolves #1728.

Depends on merging #1727 because it pulls in an npm dependency; uses style from #1750

[boneskull]

I think I'd rather go with LoDash here, since there's going to be a ton of other shims we can replace it with. @mochajs/mocha thoughts?

[ndhoule]

@boneskull Which lodash function would you use here? _.create?

[ndhoule]

@boneskull Refactored this to use lodash.create, which can easily be swapped out for a full lodash when necessary. I think this version is less expressive than the inherits version but meh

[boneskull]

@ndhoule why do you feel it's less expressive?

[jbnicolai]

@nathanboktae I agree
@boneskull create(..., {constructor: ...}) seems less expressive than inherit(..., ...).

On the other hand, since we're intending to go with lodash anyways, I say we merge this version :)

Perhaps to make this a bit nicer we could refactor it into a utility method in Base

function inherit(prototype, constructor) {
  return create(prototype, {
    constructor: constructor
  });
}

But no strong feelings about that.

[ndhoule]

haha pretty much exactly what @jbnicolai said, but really I don't care—I say merge it as is, it's certainly better than the __proto__ version

[jbnicolai]

Agree, still a huge improvement 👍