Fix code example in events API docs

[dgerber]

No description provided.

[evanlucas]

This was actually one of the changes from 0.10. require('events') now returns an EventEmitter

[Fishrock123]

See this line, directly above. This was changed ages ago. :)

[Fishrock123]

Thanks for the contribution though, hopefully you'll find something else to contribute! :)

[dgerber]

Sorry, still using v0.10...
Then you may want to change that part of the docs which still reads:

const EventEmitter = require('events').EventEmitter;

[evanlucas]

Yes we probably should. I feel that would be acceptable

[Fishrock123]

@dgerber yes, would you mind to make a PR for that? :)