Thanks for making this!

With 1.0 released; Finally we can adopt this in our company. I just wanted to open this issue in the hope it could be added as an option for future releases.

Basically adding spaces between parens and brackets.

Function arguments:
So:

function foo( one, two, three ){

Instead of

function foo(one, two, three){

Arrays:

var array = [ 1, 2, 3, 4 ]

instead of:

var array = [1, 2, 3, 4]

Methods:

array.slice( 0, 1 )

instead of

array.slice(0, 1)

This is an actual option in ESLint so I'm sure there are people using this and not just us. For me its so much easier to read a code with consistent spacing. Here's hoping you would consider this change.