Static-frame

Removed support for Python 3.8.

Set minimum ``numpy`` to 1.22.4.

Set minimum ``mypy`` to 1.9.0.

Removed support for pre 1.0 Pandas.

Updated minimum versions of optional packages.

Added ``isna()``, ``notna()``, ``isfalsy()``, and ``notfalsy()`` methods to all ``IndexBase`` subclasses.

All ``prod()`` and ``sum()`` methods now have an ``allna`` parameter to, when ``fillna`` is ``True``, specify a value if all values are NA.

Improved type hints for interfaces that accept ``IO`` objects.

URLs given to the ``WWW`` interface now escape spaces in path components.

Performance enhancements to low-level ``TypeBlocks`` routines.

Corrected issue with ``Bus`` with ``IndexHierarchy`` and ``max_persist`` greater than one.

Corrected handling of ZIP64 extensions in ``zip_namelist``.

Corrected issue with non-sequential ``Bus`` selections with ``max_persist`` greater than one, resulting in incorrectly sized generators.

Performance enhancements to ``Bus`` loading routines with ``max_persist``.

Corrected handling of ZIP64 extensions in ``ZipFileRO``.