doc: update authors list

It's that time again! Another round of author list updates.

PR-URL: https://github.com/nodejs/node/pull/8346


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>