Adding the new option, globals, to the valOptions array so that error me...

...ssage E001, "Bad option: 'globals'", does not get created.

This relates to [Issue #1178](https://github.com/jshint/jshint/pull/1178).

I am not quite sure how to add a test case for this, but *npm test* still runs successfully with 814 assertions after this minor change.