Static-frame

Removed support for Python 3.7.

Set minimum ``numpy`` to 1.19.5.

Improved type hints for ``loc`` and ``iloc`` interfaces on 2D containers.

Usage of ``from __future__ import annotations`` in all modules.

Normalized exceptions raised from invalid selections to raise ``KeyError``.

Set ``arraykit`` to 0.4.9.

Imports of ``ThreadPoolExecutor`` and ``ProcessPoolExecutor`` are now deferred until used.

Multiprocessing interfaces that use ``ProcessPoolExecutor`` now accept the ``mp_context`` parameter.

Set ``arraymap`` to 0.1.9.

Updated ``TypeBlocks`` to use ``BlockIndex.iter_block()``.

Integrated ``arraykit.BlockIndex`` in ``TypeBlocks``, offering significant ``Frame`` performance improvements.

``via_dt`` will now raise if an NA is encountered and a ``fill_value`` is not provided.

Corrected issue in ``Quilt`` construction when component ``Frame`` have ``IndexHierarchy``.

Corrected issue when using an ``Index`` as a selector in ``via_fill_value().loc[]``.

Added ``ErrorInitColumns`` to better indicated failures in column ``Index`` construction.

Improved performance when assigning an ``Index`` with ``FrameGO.__setitem__()``.

Improved typing and input handling for ``StoreFilter`` values.

Set ``arraymap`` to 0.1.8.

Removed deprecated JSON interfaces: ``Frame.from_json()``, ``Frame.from_json_url()``.