Reverse dependencies for fpm

Latest version of the following gems require fpm

Gem	Version	Date	Downloads
omnibus-sonian +4.23 Thousand Downloads	`1.2.0.1` August 29, 2013	August 29, 2013	4.23 Thousand
slugforge +3.96 Thousand Downloads	`4.0.0` August 12, 2014	August 12, 2014	3.96 Thousand
hashipkg +3.42 Thousand Downloads	`0.1.0` October 04, 2015	October 04, 2015	3.42 Thousand
ark_to_rpm +3.17 Thousand Downloads	`0.1.0` May 30, 2017	May 30, 2017	3.17 Thousand