servel.gemspec in servel-0.20.0 vs servel.gemspec in servel-0.21.0

@@ -23,10 +23,9 @@
 
   spec.add_development_dependency "bundler", "~> 1.16"
   spec.add_development_dependency "rake", "~> 12.0"
   spec.add_dependency "rack", "~> 2.0"
   spec.add_dependency "puma"
-  spec.add_dependency "naturalsorter"
   spec.add_dependency "hamlit"
   spec.add_dependency "activesupport"
   spec.add_dependency "lru_redux"
 end