Rails dependency upgrade

Author: mikemarsian

conversejs-rails.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "railties", ">= 3.1"
 
-  spec.add_development_dependency "rails", "~> 4.1.11"
+  spec.add_development_dependency "rails", "~> 4.2.7"
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake"
 end