Resolve JS hint errors

Minor touch up so it passes validation
If you use `require` you won't ever hit the problem, because that way you do not use the `context` that is `undefined`.

Try this instead:
```
"use strict";

var webPage = require('webpage');
var page = webPage.create();

page.injectJs('./bower_components/csv-js/csv.js');

var CSV = require('./bower_components/csv-js/csv.js');
console.log("out: ", CSV.parse("1,2,3"));
phantom.exit();
```
and you can see the error:
```
TypeError: 'undefined' is not an object (evaluating 'context[name] = definition()')

  ./bower_components/csv-js/csv.js:348
  ./bower_components/csv-js/csv.js:350
  ./bower_components/csv-js/csv.js:354
out:  1,2,3
```