OpenSlide binary build 4.0.0.13 released

[Benjamin Gilbert]

Hi all,

OpenSlide binary build 4.0.0.13 has been released, fixing a build
failure and updating glib.

openslide-bin 4.0.0.13 is available for download under the terms of
the GNU Lesser General Public License, version 2.1.  If you installed
OpenSlide binaries with pip, you can upgrade with `pip install
--upgrade openslide-bin`.  The binaries are also available from the
OpenSlide website:

    https://openslide.org/download/#binaries

Thanks,
--Benjamin Gilbert