v0.5.9

Fixed

• A white cursor block briefly flashed at the end of each effect, just before
  the screensaver transitioned to the next one. tte re-shows the terminal
  cursor when an effect finishes, undoing our tput civis, and it lingered
  until the next loop iteration re-hid it. The driver now passes
  --no-restore-cursor to tte (when supported and CURSOR_HIDE is on) so the
  cursor stays hidden across the whole run.