- fix dependencies (add tomli)

- update to 1.8.1:
* Remove direct imports from distutils
* Include py.typed when packaging to denote that setuptools-rust includes type hints
* Add support for pyproject.toml configuration using [tool.setuptools-rust] options
* Fix plat_name handling in the case bdist_wheel.plat_name is set via configuration file
* Drop support for Python 3.7
* Remove direct imports from pkg_resources.
* Add support for setting a custom cargo profile with the SETUPTOOLS_RUST_CARGO_PROFILE environment variable
- drop installation of example hello-world as it needs a cargo now

longer compatible with it
- Initial package (1.0.0)