Forecast-tools

* PATCH: fixed typo in setup.py
* DOCS: added missing CITATION.cff

* ENV: Updated environment to python 3.11 and package versions to latest in Dec 2023
* PATCH: np.float and np.int were deprecated in numpy v1.20. Updated `baseline` module to use native 'float' and 'int' instead.
* PATCH: `cross_validation_folds` now returns a list of tuples instead of jagged array.
* ENHANCEMENT: added `metrics.winkler_score` and `metrics.absolute_coverage_difference`
* DOCS: updated documentation to include "coverage" metrics.

* A more informative error message when training data is too short for naive method.
* Minor fixes of outdated docstrings in forecast_tools.baseline
* Improvements in the handling of invalid parameters by `auto_naive`.

* MIT LICENCE file added to PyPi package (previously missing).
* forecast_tools.feature_engineering module introduced
* forecast_tools.feature_engineering.sliding_window()

* auto_naive
* increased unit-test coverage (> 90%)

bug fix: mase for seasonal naive

cross-validation
mase