Reverse dependencies for rspec-xml

Latest version of the following gems require rspec-xml

Gem	Version	Date	Downloads
sports_data_api +67.7 Thousand Downloads	`0.15.3` October 24, 2018	October 24, 2018	67.7 Thousand
docxtor +8.65 Thousand Downloads	`0.2.1` December 23, 2013	December 23, 2013	8.65 Thousand
docxtor2 +8.42 Thousand Downloads	`0.1.0` July 30, 2013	July 30, 2013	8.42 Thousand
sick-beard +2.67 Thousand Downloads	`1.0.0.pre` January 08, 2014	January 08, 2014	2.67 Thousand