Circlify

What's Changed
* ci: add commitizen by elmotec in https://github.com/elmotec/circlify/pull/12
* ci: fixed documentation references to master by elmotec in https://github.com/elmotec/circlify/pull/13
* Create python-package.yml by elmotec in https://github.com/elmotec/circlify/pull/15
* ci: add specific versions in *requirements.txt by elmotec in https://github.com/elmotec/circlify/pull/16
* ci: add coverage back by elmotec in https://github.com/elmotec/circlify/pull/17
* ci: turn off codecov verbosity by elmotec in https://github.com/elmotec/circlify/pull/18
* ci: auto publish to pypi by elmotec in https://github.com/elmotec/circlify/pull/19
* feat: issue warning with unexpected keys in input by elmotec in https://github.com/elmotec/circlify/pull/20

**Full Changelog**: https://github.com/elmotec/circlify/compare/v0.14.0...v0.15.0

The heuristic should be good enough for 8. Still some work to be done to implement A1.5.

Scalar input data like [0, 1, 2 ...] would lose the information related to the input values when converted to Circle even after we added the ex dictionary. The input values is now stored in the ex dict when the input is a simple scalar value. That allows for downstream to display sensible text defaults when drawing the circles.

See https://github.com/elmotec/circlify#example for an example.