Remove legacy dependencies?

[justinfagnani]

I was looking at how my projects are pulling in packages like inherits and setprototypeof and http-errors came up a lot.

I see that there's some discussion of breaking changes in issues like #104 and requests for better class interop in #98. Would there be appetite for also removing inherits and setprototypeof along with those for a new major version?

[wesleytodd]

I think I missed this issue when reading your PR. Yes we intend to drop all of these with the upcoming major. I will close this and we can keep the convo in #111.