v0.2.1 — quit no longer hangs

Patch release fixing a hang on quit.

Fixed

• Quitting no longer hangs — pressing q in a large directory (e.g. $HOME) could leave the process alive for seconds after the terminal was restored: the tokio runtime waited for in-flight background directory-size scans to finish, and every keystroke typed in the meantime was swallowed until the process was killed with Ctrl+C. Jumper now exits immediately once the terminal is restored and lastdir is written, so cd-on-exit keeps working as before.

Full details in CHANGELOG.md.