v0.5.17: chore: 0.5.17 (#204)

• The mock site's sign-out page now says "You are signed out." instead of sending the browser to the home page,
  as real sites do. Without that statement a run had no evidence that the sign-out worked, so mock-sign-out
  often ended unverified even when it had signed out correctly.

• A run that only had to act, such as sending a form, is no longer marked unverified because its answer restated
  what it typed. When the run read the confirmation ("Thanks, we received it.") and its answer also named the
  sender and topic, the claim check found the quote did not show those details and failed the whole run, though
  the completion check had already confirmed the submit. Those claims are now dropped instead, as for any doubted
  claim, and a task with nothing to report still finishes.

• A drag whose drop target shifts under the pointer, such as a column that nudges or moves when a card hovers over
  it, now drops on that same control at its new place instead of being cancelled. A drag whose target turns into a
  different control is cancelled outright, so not even the card's own list receives a drop, where before letting
  go at the start could still drop the card there. A page that runs its own pointer dragging rather than the
  browser's has no such cancel; for those, Escape and letting go where the card was picked up remain the fallback.