Release 1.4.8
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* Remove Python 3.7 from ``python-version`` in CI pipelines. By @junkmd.
* Add constant definitions to ``shelllink``. By @junkmd.
* Add more tests to ``test_stream``. By @junkmd.
* Add the ``void_type`` definition to ``tlbparser``. By @junkmd.
* Modernize ``tools.tlbparser.get_tlib_filename``. By @junkmd.
* Extract the methods for parsing externals and dual interfaces from ``Parser.parse_typeinfo``. By @junkmd.
* Fix type annotations referenced by ``tlbparser``. By @junkmd.
* Modernize ``codegenerator.namespaces``. By @junkmd.
* Refactor patching classes in ``_cominterface_meta.__new__``. By @junkmd.