Log Message:
py-sphinx: updated to 2.4.3

Release 2.4.3:

Bugs fixed
* autodoc: ``*args`` and ``**kwarg`` in type comments are not handled
  properly
* autodoc: classmethod coroutines are not detected
* intersphinx: ``:attr:`` reference to property is broken
* html search: Search breaks/hangs when built with dirhtml builder
* todo: emit doctree-resolved event with non-document node incorrectly