Whalrus

-----------------------------------------

* Reach 100% of test coverage. Cf. https://codecov.io/gh/francois-durand/whalrus.
* Convert documentation to Numpy style. The documentation is not changed much in html format, but is more readable in
plain text.
* Remove hash function for ``BallotOneName`` and ``BallotOrder``. It had a bug, and fixing it would have implied to
change all sets of candidates to frozen sets. Since this function is non-essential, we decided to remove it instead.
* Fix bug in ``MatrixWeightedMajority`` when using the option ``ordered_vs_absent`` or ``absent_vs_ordered``.
* Fix bug in ``Rule.trailer_`` when there is only one candidate in the election.

---------------------------------------------------

---------------------------------------------------

* Files from some sub-packages, such as ``scale``, were missing. This release fixes that bug.

---------------------------------------

---------------------------------------

* Fix PyPI deployment.

----------------------------------

----------------------------------

* This patch concerns Whalrus' developpers only. To develop and maintain the package, it uses GitHub actions
instead of additional services such as Travis-CI and ReadTheDocs.
* Use Codecov.
* Prepare support for Numpy documentation style (not used yet).
* Prepare support for notebooks in documentation (not used yet).

-------------------------------

-------------------------------

* Minor patch to speed up the computation of the winner in some cases.

--------------------------------

--------------------------------

* Fix a bug related to random tie-break.
* In the arguments of class ``RuleRankedPairs``, the tie-break can be given directly, instead of having to go through
the argument ``matrix``.

---------------------------