Undo renamed TLD cache file.

This is an internal file and shouldn’t matter, but I believe some ops teams are relying on this filename in 1.x. It’s free to change in 2.x.
Fix what was supposed to be testing an unlikely suffix.

It is now wholly owned, according to the PSL. See https://github.com/mozilla/mozilla-central/commit/a97e23bc2acab36ddaceb7b7f485ffd46f9d690f)

It’s gonna be an interesting future for this library, with arbitrary suffixes like this out there.
Update bundled snapshot
bump minor version