www/hackernews-tui: update to 0.12.0

What's Changed
- Update dependencies and fix clippy errors in #82
- Add authentication and upvote support in #81
- Refactor modeling, parsing, and client codes in #84
- Voting support follow-ups in #85

What's new
- With authentication support added, users can now authenticate their
  account and upvote stories/comments.
  More details: https://github.com/aome510/hackernews-TUI#authentication

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