Add rubocop config

Author: ferhatelmas

.rubocop.yml

@@ -1,26 +1,34 @@
-Documentation:
-  Enabled: false
+AllCops:
+  DisabledByDefault: false
+  NewCops: enable
+  TargetRubyVersion: 2.5
 
-AccessorMethodName:
+Layout/LineLength:
   Enabled: false
 
-TrivialAccessors:
+Lint/RedundantCopDisableDirective:
   Enabled: false
 
-RedundantReturn:
+Metrics/AbcSize:
   Enabled: false
-
-ModuleLength:
+Metrics/BlockLength:
+  Enabled: false
+Metrics/ClassLength:
+  Enabled: false
+Metrics/MethodLength:
   Enabled: false
 
-Encoding:
-  EnforcedStyle: when_needed
-
-LineLength:
-  Max: 180
+Naming/AccessorMethodName:
+  Enabled: false
 
-MethodLength:
-  Max: 11
+Security/Open:
+  Enabled: false
 
-Style/RegexpLiteral:
+Style/AccessorGrouping:
+  Enabled: false
+Style/Documentation:
+  Enabled: false
+Style/DoubleCopDisableDirective:
+  Enabled: false
+Style/FrozenStringLiteralComment:
   Enabled: false

Gemfile

@@ -3,4 +3,13 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'simplecov', :require => false, :group => :test
+group :test do
+  gem 'simplecov', require: false
+end
+
+group :dev do
+  gem 'method_source'
+  gem 'pry'
+  gem 'pry-doc'
+  gem 'rubocop', require: false
+end

Rakefile

@@ -3,5 +3,10 @@ require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new
 
-task default: :spec
-task test: :spec
+require 'rubocop/rake_task'
+RuboCop::RakeTask.new(:rubocop) do |t|
+  t.options = ['--display-cop-names']
+end
+
+task default: [:spec]
+task test: [:spec]