More than 10 containers triggers EventEmitter memory leak warning

[BryanDonovan]

If you create more than 10 containers, node's EventEmitter spews a warning about a possible memory leak.

I forked the project and added a test that demonstrates the problem (the test doesn't fail, but you should see the warning): https://github.com/BryanDonovan/winston/tree/max-listeners

My hacky solution is to add maxListeners as an option to container.get():

container.get('foo', {
  maxListeners: 0,
  file: {
    filename: '/foo/bar.log'
  }
});

[mainiak]

So solution is just to rise maximum of the listeners?

[BryanDonovan]

Yeah, at least for my scenario. The "real" solution was to rewrite my code to not have 10 containers in one logger instance.

[indexzero]

Related to #327

[indexzero]

Fixed in 44564de