Githubkit

- allow extra field for rest model
- change issue timeline event type to literal

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.7.0...v0.8.0

- fix timezone aware in app auth
- fix paginator async callable detection
- keep restapi and webhook definitions up-to-time (breaking due to upstream deletion)

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.6.2...v0.7.0

- correct unset type `__bool__` typing to make static checking correct
- improve some obj repr

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.6.1...v0.6.2

- catch httpx exception
- separate core and githubkit

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.6.0...v0.6.1

- introduce new auth strategy
- fix some codegen bug

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.5.0...v0.6.0

- add map function support for pagination
- rewrite webhook types and fix event name error

**Full Changelog**: https://github.com/yanyongyu/githubkit/compare/v0.4.2...v0.5.0