Add GioWin32-2.0.typelib to Windows

In v1.4.3RC, attempting to load the GI introspection libraries in Windows results in the following error:

(process:28640): GLib-GIRepository-CRITICAL **: 07:18:05.801: Unable to load platform-specific GIO introspection data: Typelib file for namespace 'GioWin32' (any version) not found

For example, this happens when running the extension manager or calling

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

The MR adds the GioWin32-2.0.typelib during the build (3 KB), which prevents the error.

Please add forward port label