Loosen up the death grip on #19 with `switch`

* `switch` is designed to handle multiple logic cases since ES3 and forward.
* There is no requirement for the prior restrictions in any of the styleguides currently mentioned in #19
* Noted that curly braces can be used for code folding, otherwise they are mostly useless imho and as far as I know
* Added `expressionNth` to the sample with a simple fall through.
* GMs requirement of adding a comment for fallthroughs seems rather tautological since this is how the statement has been in the C family of languages and all of its derivatives for many decades.