Merge pull request #71 from AlchemyCMS/depfu/update/rails-5.2.1

Upgrade rails to version 5.2.1

Author: tvdeyen

Gemfile

@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gemspec
 
-gem 'rails', '~> 5.1.6'
+gem 'rails', '~> 5.2.1'
 gem 'alchemy_cms', github: 'AlchemyCMS/alchemy_cms', branch: 'master'
 gem 'sassc-rails'