Release v0.4.3

Features
- Add a panic hook to reset terminal upon panic
Documentation
- Add instructions for installing on Alpine Linux
Miscellaneous Tasks
- Switch to `owo-colors` for fixing `RUSTSEC-2021-0145`
- Add mergify config for automatic merge
- Bump the Rust version in Dockerfile
Styling
- Use better colors when background color is set to `reset`
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