PeerInfo required in config but not in README

[cretz]

At

js-libp2p/src/config.js

Line 10 in 187d584

peerInfo: Joi.object().required(),

it has peer info required, but in the README it says "peerInfo: instance of PeerInfo that contains the PeerId, Keys and multiaddrs of the libp2p Node. Optional.". I would just like to be a client to the DHT to lookup providers so I think, like the Go impl, you shouldn't need peer info for it but I don't know enough details about the DHT impl to know.

[jacobheun]

Fixed by #236 readme update.