Fix undefined error in browser when compiled with Babel

[williamukoh]

Provides a fallback for script to still work in browser, after compiling with Babel. Babel converts this to undefined

[Olical]

I was wondering why there were so many commits then I realised you targeted develop which I had forgotten about 😅 so you've updated develop for me I guess. Also didn't realise this was an issue, why is this not defined when you use babel + browser? I guess it gets wrapped in some object or function call that screws with it?

[williamukoh]

Was just following your instructions Sir! --> Contributing (aim your pull request at the develop branch!)

It was kinda strange to me at first. I was using a gulp-babel setup to compile source JS files and noticed anytime I tried new EventEmitter(), I kept getting undefined. So I copied your source code https://github.com/Olical/EventEmitter/blob/master/EventEmitter.js and pasted into https://babeljs.io/repl/, and noticed argument passed to the self-executing anonymous function was changed from this || {} to undefined || {}

[Olical]

Yup, I know :D it's not a problem at all, just forgot it was that way. I'll update those things to how I like to do things now, thanks for reminding me.

I think I see your issue though and I think this fix is fine? I just hope it doesn't break it for anyone else. I'm guessing you have tried this version and it's all okay?

[williamukoh]

Yes I have. And it works fine. Doesn't break anything over here ;)