- update to 1.9.0:
* feat: Add a ``text_truncation_chars`` configuration for
values that exceed ``max_column_width`` in
:meth:`.Table.print_table` and :meth:`.Table.print_html`.
* feat: Add a ``number_truncation_chars`` configuration for
values that exceed ``max_precision`` in
:meth:`.Table.print_table` and :meth:`.Table.print_html`.
* feat: Lowercase the ``null_values`` provided to individual
data types, since all comparisons to ``null_values`` are
case-insensitive. (#770)
* feat: :class:`.Mean` works with :class:`.TimeDelta`. (#761)
* Switch from ``pytz`` to ``ZoneInfo``.
* Add Python 3.12 support.
* Drop Python 3.7 support (end-of-life was June 27, 2023).

- buildrequire glibc-locale for tests
- Only BuildRequire unittest2 under Python 2.