stasharr 1.3.1

Matching fixes for names outside plain ASCII, and a round of hardening. The first release to
arrive through auto-update: if you installed 1.3.0, you don't have to do anything.

Fixed

• Accented names match again. "Zoë Doll" was reduced to zodoll, so a release named
  Zoe.Doll… never counted as a Performer hit. Accents are now folded before comparing, for
  performers, studios and titles alike.
• Non-Latin studio names no longer match everything. A studio written in, say, Japanese
  normalized to an empty string, and every release "contained" it — one free hit that let
  unrelated releases past the ≥ 2 filter. Such names now only match releases that carry them.
• "✓ Sent" no longer forgets a release when two Download buttons are clicked in quick
  succession. Both used to read the stored list at the same time, and the second write dropped
  the first. Sent releases are now recorded by the background script, one at a time.
• Error messages can't inject markup into StashDB. Failed searches showed Prowlarr's error
  text as HTML inside the stashdb.org page. Every message that carries outside text is now
  inserted as plain text.
• The DOM fallback reads the right title and date. When StashDB's API is unreachable, the
  title came from the tab title (with "| StashDB" attached) and the date was the first date
  anywhere on the page. Both now come from the scene header; if there's no date there, the
  search runs without one instead of guessing.
• Connection tests report every failure on the options page, instead of hanging on
  "Testing…" when the extension couldn't be reached.

Changed

• Scene changes are picked up instantly by reacting to page changes, instead of checking
  the URL every 600 ms around the clock.
• The license notice no longer says "no tests", which stopped being true in 1.3.0.