fix rubocop yml

.rubocop.yml

@@ -1,10 +1,8 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  Excludes:
+  Exclude:
-    - bin/**
+    - 'bin/**'
-    - db/**
-    - config/**
 
 Metrics/LineLength:
   Enabled: false

Gemfile

@@ -9,5 +9,5 @@ group :test do
   gem 'rspec'
   gem 'rubocop'
   gem 'coveralls', require: false
-  gem "codeclimate-test-reporter", require: nil
+  gem 'codeclimate-test-reporter', require: nil
 end