WARN: Re-evaluate unserved states for scraping potential.

[stucka]

We haven't re-assessed holes in the WARN coverage in a while, and have more members coming online that might benefit. A decision on scrapers beyond Pennsylvania is a different question.

• [ ] Arkansas
• [ ] Massachusetts -- Do-able. Data comes from a CSV (!) with a dynamic filename. Historical data may not be nearly so easy and they didn't respond when I asked ages ago.
• [ ] Minnesota
• [ ] Mississippi
• [ ] Nevada
• [ ] New Hampshire
• [ ] North Carolina
• [ ] North Dakota
• [.] Pennsylvania -- do-able, scraper in progress
• [ ] Puerto Rico
• [ ] Virgin Islands
• [ ] West Virginia
• [ ] Wyoming