docbook-xsl 1.78.1

Closes #20155.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
sphinx 2.0.8

Closes #20154.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libqglviewer 2.4.0

Closes #20156.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>