update ruby and gem versions

config/application.rb

@@ -3,10 +3,7 @@ require File.expand_path('../boot', __FILE__)
 require 'rails/all'
 
 if defined?(Bundler)
-  # If you precompile assets before deploying to production, use this line
-  Bundler.require(*Rails.groups(:assets => %w(development test)))
-  # If you want your assets lazily compiled in production, use this line
-  # Bundler.require(:default, :assets, Rails.env)
+  Bundler.require(*Rails.groups)
 end
 
 module Velocipede