Matches the Node 8 API. v1 matched Node 4, and some new methods have
since been introduced (notably `prepend[Once]Listener`).
The major bump in `events` was because:
 - There is a breaking change in the `listeners()` method regarding
   `once()` listeners nodejs/node#6881
   I think it's super unlikely to affect anyone, but there you go.
 - The gzipped size almost doubled from 1.1KB to 2.1KB. It'll shrink a
   bit because some patches have since landed in Node that remove some
   code, but it'll still be bigger than it was because of the new
   methods.
Deets:
https://github.com/Gozala/events/releases/tag/v2.0.0