chore(build): set production environment

[deini]

build:min is not setting production environment.

So this causes to log to the console even when building for production plus we are not getting webpack to optimize accordingly for prod.

You are currently using minified code outside of NODE_ENV === 'production'. This means that you are running a slower development build of Redux.
You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify or DefinePlugin for webpack (http://stackoverflow.com/questions/30030031) to ensure you have the correct code for your production build.'

@AntJanus

We probably want to upgrade to a newer version of webpack too.

Should close #126

[AntJanus]

I was gonna be against it but minified usually means production, I'm all for it!

[AntJanus]

Yeah, I really want to get on upgrading some of these modules. It's in the 3.5.0 milestone. I'll add this one to it as well and merge it in as soon as I get a chance to test it.

[HunterEl]

Ignoring the conflict, I agree with the nature of the change. Thank you.