Support TemplateLiterals and quotemark option.

I had originally filed this to solve issue #1797. This solves the problem for me, but I think checking the value of data.quote inside of style.js  would probably be more correct. If anyone could point me in the right direction of doing so I would appreciate it. We need to populate the data.quote with a ` (backtick) character instead of being undefined.
Sure, https://github.com/jshint/jshint/blob/338f74ce096e95c5cca43dfd87fcc2b04bfd979b/src/lex.js#L926