Upgrade Ruby and add StandardRB

.ruby-version

@@ -1 +1 @@
-2.4.2
+2.6.6

.tool-versions

@@ -1 +1 @@
-ruby 2.4.2
+ruby 2.6.6

Gemfile

@@ -1,63 +1,64 @@
-source 'http://rubygems.org'
-ruby '2.4.2'
+source "http://rubygems.org"
+ruby "2.6.6"
 
-gem 'dotenv-rails', :groups => [:development, :test]
+gem "dotenv-rails", groups: [:development, :test]
 
-gem 'rails', '~> 5.1'
+gem "rails", "~> 5.1"
 
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
 
-gem 'administrate'
-gem 'administrate-field-image'
-gem 'aws-sdk'
-gem 'bourbon'
-gem 'coffee-rails'
-gem 'dragonfly'
-gem 'dragonfly-s3_data_store'
-gem 'jquery-rails'
-gem 'kaminari'
-gem 'kramdown'
-gem 'mime-types'
-gem 'nokogiri'
-gem 'oath'
-gem 'oath-generators'
-gem 'pg'
-gem 'sass-rails'
-gem 'simple_form'
-gem 'slugtastic'
-gem 'uglifier'
-gem 'unf'
+gem "administrate"
+gem "administrate-field-image"
+gem "aws-sdk"
+gem "bourbon"
+gem "coffee-rails"
+gem "dragonfly"
+gem "dragonfly-s3_data_store"
+gem "jquery-rails"
+gem "kaminari"
+gem "kramdown"
+gem "mime-types"
+gem "nokogiri"
+gem "oath"
+gem "oath-generators"
+gem "pg"
+gem "sass-rails"
+gem "simple_form"
+gem "slugtastic"
+gem "uglifier"
+gem "unf"
 
 # Bundle gems for the local environment. Make sure to
 # put test-only gems in this group so their generators
 # and rake tasks are available in development mode:
 group :development do
-  gem 'ruby_parser'
-  gem 'powder'
-  gem 'better_errors'
-  gem 'binding_of_caller'
-  gem 'letter_opener'
+  gem "ruby_parser"
+  gem "powder"
+  gem "better_errors"
+  gem "binding_of_caller"
+  gem "letter_opener"
+  gem "standardrb"
 end
 
 group :test, :development do
-  gem 'rspec-rails'
-  gem 'rails-controller-testing'
-  gem 'rubocop'
-  gem 'pry'
+  gem "rspec-rails"
+  gem "rails-controller-testing"
+  gem "rubocop"
+  gem "pry"
 end
 
 group :test do
-  gem 'factory_bot_rails'
-  gem 'shoulda'
-  gem 'poltergeist'
-  gem 'database_cleaner'
-  gem 'fivemat'
-  gem 'capybara-screenshot'
-  gem 'simplecov'
+  gem "factory_bot_rails"
+  gem "shoulda"
+  gem "poltergeist"
+  gem "database_cleaner"
+  gem "fivemat"
+  gem "capybara-screenshot"
+  gem "simplecov"
 end
 
 group :production do
-  gem 'puma'
-  gem 'rails_12factor'
+  gem "puma"
+  gem "rails_12factor"
 end

Gemfile.lock

@@ -320,6 +320,10 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    standard (0.0.36)
+      rubocop (>= 0.63)
+    standardrb (1.0.0)
+      standard
     thor (0.20.3)
     thread_safe (0.3.6)
     tilt (2.0.8)
@@ -381,11 +385,12 @@ DEPENDENCIES
   simple_form
   simplecov
   slugtastic
+  standardrb
   uglifier
   unf
 
 RUBY VERSION
-   ruby 2.4.2p198
+   ruby 2.6.6p146
 
 BUNDLED WITH
-   1.16.1
+   1.17.2