Get EventEmitter correctly

[HebaruSan]

atom-irc is erroring out currently at this line:

util.inherits(Client, EventEmitter);

TypeError: The super constructor to "inherits" must not be null or undefined

The documentation for inherits says that the "super constructor" is the second parameter, so this error implies that EventEmitter is null or undefined. I checked the documentation, and it says:

const EventEmitter = require('events');

But node-irc currently does this instead:

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

If I remove the trailing .EventEmitter as in this pull request, the error in atom-irc is resolved.

[Jmots2]

Was fixed at one time earlier; apparent proper fix: #281

https://github.com/martynsmith/node-irc/commit/0fd26a791710ff343815e6dc8e362e532fa40588