should was_defendant_served return a dict?

[mscarey]

@funkonaut, I saw your comment asking why was_defendant_served should return a dict, and I saw that you changed Hays County to return a string while the other counties still return a dict in the form Dict[name, date]. I reverted the change because I think it's going to be a problem for the scraper to return different datatypes depending on what county is being scraped.

Based on the discussion in the issue tracker, it seems like this field might not be in use at all. As long as it returns consistent datatypes, it probably won't break anything. If you want to change the datatype, I think you should change it for every county at once.