Reverse dependencies for disqus

Latest version of the following gems require disqus

Gem	Version	Date	Downloads
mokio +32.9 Thousand Downloads	`2.0.8` January 17, 2020	January 17, 2020	32.9 Thousand
spree_cms +8.18 Thousand Downloads	`0.0.4` March 02, 2011	March 02, 2011	8.18 Thousand
engagement +7.85 Thousand Downloads	`1.1.0` September 27, 2013	September 27, 2013	7.85 Thousand
spree_wordsmith +4.9 Thousand Downloads	`0.1.0` March 03, 2011	March 03, 2011	4.9 Thousand