What's new in 1.0.4 (May ??, 2020)

These are the changes in pandas 1.0.4. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

Bug in :meth:`GroupBy.first` and :meth:`GroupBy.last` where None is not preserved in object dtype (:issue:`32800`)

.. contributors:: v1.0.3..v1.0.4|HEAD