Reverse dependencies for UPnP

Latest version of the following gems require UPnP

Gem	Version	Date	Downloads
nlhue +9.58 Thousand Downloads	`0.2.0` March 07, 2021	March 07, 2021	9.58 Thousand
UPnP-MediaServer +5.96 Thousand Downloads	`1.0.0` July 23, 2008	July 23, 2008	5.96 Thousand
UPnP-ContentDirectory +5.78 Thousand Downloads	`1.0` July 23, 2008	July 23, 2008	5.78 Thousand
UPnP-ConnectionManager +5.66 Thousand Downloads	`1.0` July 23, 2008	July 23, 2008	5.66 Thousand