v0.2.0

• Fewer false soft-404s on sites unlike a personal blog:
  • A link is no longer suspect when the made-up probe URL redirects to the link itself, as on
    sites that find an article by its ID and ignore the rest of the URL.
  • A shared <title> no longer makes a link suspect when the two pages' text differs.
• A link that looks like a soft-404 is now UNVERIFIABLE instead of suspect when the host's root
  gets the same page as the probe (probe: every URL gets the same page) or the page asks for
  JavaScript (probe: page needs JavaScript). Detection may GET a host's root once.
• Snapshot lookups run for dead links first, then suspects, so a deadline cuts off suspects first.
• The action takes a path input (default .) for a site in a subfolder.