Reverse dependencies for UPnP

Latest version of the following gems require UPnP

Gem	Version	Date	Downloads
nlhue +9.52 Thousand Downloads	`0.2.0` March 07, 2021	March 07, 2021	9.52 Thousand
UPnP-MediaServer +5.94 Thousand Downloads	`1.0.0` July 23, 2008	July 23, 2008	5.94 Thousand
UPnP-ContentDirectory +5.76 Thousand Downloads	`1.0` July 23, 2008	July 23, 2008	5.76 Thousand
UPnP-ConnectionManager +5.64 Thousand Downloads	`1.0` July 23, 2008	July 23, 2008	5.64 Thousand