Reverse dependencies for spliner

Latest version of the following gems require spliner

Gem	Version	Date	Downloads
simple_metric +10.1 Thousand Downloads	`0.0.3` April 29, 2014	April 29, 2014	10.1 Thousand
curver +5.41 Thousand Downloads	`0.0.2` April 14, 2017	April 14, 2017	5.41 Thousand
qttk +4.71 Thousand Downloads	`0.2` February 24, 2018	February 24, 2018	4.71 Thousand
curvature +3.59 Thousand Downloads	`0.1` January 17, 2016	January 17, 2016	3.59 Thousand