[FEATURE] Officially support Rails 5.2

Closes #45

.travis.yml

@@ -13,6 +13,7 @@ gemfile:
   - gemfiles/Gemfile.rails-4-2
   - gemfiles/Gemfile.rails-5-0
   - gemfiles/Gemfile.rails-5-1
+  - gemfiles/Gemfile.rails-5-2
 
 install:
   - bundle install

CHANGELOG.md

@@ -6,6 +6,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ## x.y.z (unreleased)
 
 ### Added
+- Officially support Rails 5.2
+  ([#51](https://github.com/braingourmets/currency_select/pull/51))
 
 ### Changed
 

currency_select.gemspec

@@ -17,7 +17,8 @@ Gem::Specification.new do |s|
   s.files = %w(lib/currency_select.rb rails/init.rb CHANGELOG.md CODE_OF_CONDUCT.md currency_select.gemspec Gemfile LICENSE Rakefile README.md VERSION)
   s.extra_rdoc_files = %w(CHANGELOG.md LICENSE README.rdoc)
 
-  s.add_runtime_dependency 'actionview'
+  s.add_runtime_dependency 'actionview', '>= 4.2.0', '< 6.0'
   s.add_runtime_dependency 'money'
+
   s.add_development_dependency 'rspec-rails'
 end

gemfiles/Gemfile.rails-5-2

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source 'http://rubygems.org'
+
+gem 'rails', '~> 5.2.0'
+
+gemspec path: '../'