v3.0.0

This release updates the NetworkController to use v3 of Infura's API (see #267).

Breaking change:

A project ID is now required for all instantiations of the NetworkController that are backed by Infura.

const controller = new NetworkController({
  infuraProjectId: 'foo',
}, {
  network: '1',
  provider: { type: 'mainnet' },
});