* Create ci.yml
* include pytest
* Update pyproject.toml
* include pytest-cov
* use approx in pytest
* Update test_faces.py
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* add coverage yaml
* reduce passing grade
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
