Upgrade Rails to 5.1.7

.ruby-version

@@ -1 +1 @@
-2.2.3
+2.3.1

.travis.yml

@@ -1,7 +1,7 @@
 language: ruby
 bundler_args: --without development production staging
 rvm:
-  - 2.2.3
+  - 2.3.1
 addons:
   postgresql: 9.4
 # uncomment this line if your project needs to run something other than `rake`:

Gemfile

@@ -1,71 +1,89 @@
 source 'https://rubygems.org'
 
-gem 'rails', '4.2.5.2'
-gem 'apipie-rails' # Documentation
-gem 'devise', '>= 3.5.4'
-gem 'annotate'
-gem 'sass-rails'#,   '~> 3.2.3'
-gem 'uglifier'#, '>= 1.0.3'
-gem 'susy', '~> 1.0.9'
-gem 'compass'#, '>= 0.12.2'
-gem 'compass-rails'#, '>= 1.0.3'
-gem 'will_paginate' #, '~> 3.0.6'
-gem 'api_pagination_headers'
-gem 'traco'
-gem 'httparty'
-gem 'select2-rails'
-gem 'groupdate'
-gem "chartkick"
+gem 'rails', '5.1.7'
+
+# Dependency resolution for Rails 5
+gem 'railties', '5.1.7'
+gem 'loofah', '~> 2.19.1'
+gem 'nokogiri', '~> 1.6.0'
+gem 'rails-dom-testing', '~> 2.0', '< 2.2.0'
+
+gem 'apipie-rails', '~> 0.6'
+gem 'devise', '>= 3.5.10'
+gem 'annotate', '3.1.0'
+gem 'sass-rails', '5.0.7'
+gem 'uglifier', '~> 2.7.2'
+gem 'susy', '~> 2.2.14'
+gem 'compass', '~> 1.0.3'
+gem 'compass-rails', '~> 4.0.0'
+gem 'will_paginate', '~> 3.0.7'
+gem 'api_pagination_headers', '>= 2.1.1'
+gem 'traco', '~> 5.3.3' # TODO: switch to mobility
+gem 'httparty', '~> 0.13.3'
+gem 'select2-rails', '~> 3.5.9.3'
+gem 'groupdate', '~> 4.0.0'
+gem 'chartkick', '~> 1.3.2'
+gem 'listen', '>= 3.0.5', '< 3.2'
 
 group :test do
   gem 'shoulda'
-  gem 'capybara'
-  gem 'factory_girl_rails'
-  gem 'simplecov', require: false
-  gem 'codeclimate-test-reporter', require: nil
-  gem 'link_header'
-  gem 'launchy'
-  gem 'mocha'
+  gem 'capybara', '~> 2.8'
+  gem 'factory_girl_rails', '~> 4.5.0' # UPGRADE TODO: gem 'factory_bot_rails', '4.11.1'
+  gem 'simplecov', '~> 0.17.1', require: false
+  # gem 'codeclimate-test-reporter', require: nil # UPGRADE: removed
+  gem 'link_header', '~> 0.0.8'
+  gem 'launchy', '~> 2.4.3'
+  gem 'mocha', '~> 1.1.0'
 end
 
 group :staging, :production do
   gem 'dotenv-rails'
 end
 
 # Use postgresql as the database for Active Record
-gem 'pg'
-gem 'schema_plus'
+gem 'pg', '~> 1.2'
+# gem 'schema_plus', '~> 2.1.0' # was 1.8.7
+gem 'schema_associations', '~> 1.2.7';
+gem 'schema_auto_foreign_keys', '~> 0.1.3';
+gem 'schema_validations', '~> 2.3.0';
 # Use CoffeeScript for .js.coffee assets and views
-gem 'coffee-rails', '~> 4.0.0'
+gem 'coffee-rails', '~> 4'
+
 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
 # gem 'therubyracer',  platforms: :ruby
 
 # Use jquery as the JavaScript library
-gem 'jquery-rails'
+gem 'jquery-rails', '~> 4.6.0'
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
-gem 'turbolinks'
+gem 'turbolinks', '~> 2.5.3'
 # Build JSON / XML API
-gem 'rabl'
+gem 'rabl', '~> 0.14.0'
 # Also add either `oj` or `yajl-ruby` as the JSON parser
-gem 'oj'
+gem 'oj', '~> 2.12.1'
 # bundle exec rake doc:rails generates the API under doc/api.
-gem 'sdoc', '~> 0.4.0',          group: :doc
+gem 'sdoc', '~> 0.4.0', group: :doc
 
 # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-gem 'spring',        group: :development
+gem 'spring', '~> 1.6.3', group: :development
 
 group :development do
   gem 'capistrano', '~> 3.4.0'
-  gem 'capistrano-rails'
-  gem 'capistrano-bundler'
-  gem 'capistrano-rvm'
+  gem 'capistrano-rails', '~> 1.6.3'
+  gem 'capistrano-bundler', '~> 2.1.1'
+  gem 'capistrano-rvm', '~> 0.1.2'
   gem 'capistrano-maintenance', '~> 1.0', require: false
   gem 'capistrano-passenger', '~> 0.1.1', require: false
   gem 'rack-cors', :require => 'rack/cors'
+
+  # Support ed25519 SSH keys
+  gem 'rbnacl', '4.0.2'
+  gem 'rbnacl-libsodium', '1.0.16'
+  gem 'bcrypt_pbkdf', '1.1.0'
+  gem 'ed25519', '1.2.4'
 end
 
 group :development, :test do
-  gem 'byebug'
+  gem 'byebug', '~> 4.0.2'
 end
 
-gem 'appsignal'
+gem 'appsignal', '~> 3.3.11'