Pynrw

What's Changed
- Utilize `contextlib.closing` for managing `sqlite3` `cursor` resources
- Update documention

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.5.1...v1.5.2

What's Changed
- Update `setuptools` config
- Further internal adjustments

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.5.0...v1.5.1

What's Changed
- Remove `reverse_inorder`
- Replace `_display_binary_node_impl` with a permissively-licensed alternative
- Further internal adjustments

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.4.2...v1.5.0

- Improve the implementation of `Server`

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.4.1...v1.4.2

- Improve documentation
- Link source to the project

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.4.0...v1.4.1

What's Changed
- Implement network classes by realshouzy in https://github.com/realshouzy/pynrw/pull/4
- Fix critical mistakes in the implementation of the traversal algorithms
- Further internal adjustments

**Full Changelog**: https://github.com/realshouzy/pynrw/compare/v1.3.0...v1.4.0