Check-sdist

This release fixes symlink detection (regression in 0.1.1). There's also now a `--version` flag.

What's Changed

* fix: include symlinks in checks by henryiii in https://github.com/henryiii/check-sdist/pull/8
* fix: include `--version` flag by henryiii in https://github.com/henryiii/check-sdist/pull/9


**Full Changelog**: https://github.com/henryiii/check-sdist/compare/v0.1.1...v0.1.2

This version fixes a crash when running on a setuptools generated package. Also adds extended testing with an infrastructure for checking git repositories, mypy checking, and a minor cleanup to the internal API.

What's Changed
* fix: setuptools support by henryiii in https://github.com/henryiii/check-sdist/pull/6

**Full Changelog**: https://github.com/henryiii/check-sdist/compare/v0.1.0...v0.1.1

First release of check-sdist! Basic checking + junk injection, some config (TOML only), pre-commit hook.