Better rubocop configuration

.rubocop.yml

@@ -1,9 +1,9 @@
 AllCops:
   TargetRubyVersion: 2.5
-  Include:
-    - '**/Rakefile'
-    - '**/config.ru'
   Exclude:
+    - 'node_modules/**/*'
+    - 'vendor/**/*'
+    - '.git/**/*'
     - 'lib/tasks/auto_annotate_models.rake'
     - 'db/**/*'
     - 'config/**/*'

Gemfile

@@ -47,7 +47,7 @@ group :development do
   gem 'spring-watcher-listen', '~> 2.0.0'
 
   gem 'capistrano-rails'
-  gem 'rubocop', '~> 0.56'
+  gem 'rubocop', '~> 0.56.0', require: false
 end
 
 group :test do

Gemfile.lock

@@ -241,7 +241,7 @@ DEPENDENCIES
   puma (~> 3.11)
   rails (~> 5.2.0)
   rails-i18n (~> 5.1)
-  rubocop (~> 0.56)
+  rubocop (~> 0.56.0)
   sass-rails (~> 5.0)
   selenium-webdriver
   spring

app/mailers/application_mailer.rb

@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: 'from@example.com'
+  default from: "from@example.com"
-  layout 'mailer'
+  layout "mailer"
 end

test/controllers/pages_controller_test.rb

@@ -1,4 +1,4 @@
-require 'test_helper'
+require "test_helper"
 
 class PagesControllerTest < ActionDispatch::IntegrationTest
   test "home loads without error" do

test/test_helper.rb

@@ -1,6 +1,6 @@
-ENV['RAILS_ENV'] ||= 'test'
+ENV["RAILS_ENV"] ||= "test"
-require_relative '../config/environment'
+require_relative "../config/environment"
-require 'rails/test_help'
+require "rails/test_help"
 
 class ActiveSupport::TestCase
   # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.