Format JavaScript objects with unquoted property names

[salcode]

In #181 we added a new command :JSONFormat which takes a JSON object and properly formats it.

e.g.

{"data":{"attributes":{"name":"sal"}}}

becomes

{
    "data": {
        "attributes": {
            "name": "sal"
        }
    }
}

Unquoted Properties

Unfortunately, I find I'm often dealing with objects in JavaScript, which have less strict formatting rules. Specifically, the property names do not need to be quoted. e.g.

{
    data: {
        attributes: {
            name: "sal"
        }
    }
}

Note: data, attributes, and name do not have quotes around them.

Additionally unfortunately, our current method fails in this situation.

It would be nice if the formatting logic handled this scenario as well.