Set TargetRubyVersion to 2.3 in Rubocop

.rubocop.yml

@@ -1,2 +1,4 @@
+AllCops:
+  TargetRubyVersion: 2.3
 Documentation:
   Enabled: false

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 ruby '2.3.0'

config/environment.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'app'
 $LOAD_PATH << App.root.join('lib')
 Dir[App.root.join('config/initializers/*.rb')].each { |f| require f }

config/initializers/sequel.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pg'
 require 'sequel'
 

config/schedule.rb

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 job_type :rake, 'cd :path && foreman run bundle exec rake :task --silent :output'
 
 every '*/15 13,14,15,16,17 * * 1-5' do
-  rake "rates:update"
+  rake 'rates:update'
 end

config/unicorn.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 preload_app true
 worker_processes((ENV['WORKER_PROCESSES'] || 4).to_i)
 timeout 10

db/migrate/001_create_currencies.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Sequel.migration do
   change do
     create_table :currencies do

lib/tasks/db.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :db do
   desc 'Create db'
   task :create do

lib/tasks/environment.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 task :environment do
   require './config/environment'
 end

lib/tasks/rates.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :rates do
   task setup: :environment do
     require 'currency'

lib/tasks/test.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rake/testtask'
 
 Rake::TestTask.new(test: :environment) do |t|

spec/api_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'helper'
 require 'rack/test'
 require 'api'

spec/currency_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'helper'
 require 'currency'
 

spec/helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV['RACK_ENV'] = 'test'
 require './config/environment'
 require 'minitest/autorun'

spec/quote_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'helper'
 require 'quote'