Fixed issue in using ``relabel()`` on columns in ``FrameGO``.
Fixed issue in using ``Frame.drop`` with ``IndexHierarchy`` on either axis.
Unified ``to_frame`` and ``to_frame_go`` interfaces on ``Frame``, ``FrameGO``, and ``IndexHierarchy``.
Enabled ``include_index``, ``include_columns`` parameters for ``Frame.to_parquet``.
Added ``columns_select`` parameter to ``Frame.from_parquet``.
Updated requirements: pyarrow==0.16.0
Refined ``Frame.from_arrow`` usage of ChunkedArray, disabling ``date_as_object``, enabling ``self_destruct``, and improving handling of NumPy array extraction.
Added ``STATIC`` attribute to ``ContainerBase`` and all subclasses.