Update rubocop inheriting from hanami repositor

.gitignore

@@ -22,3 +22,4 @@ tmp
 mkmf.log
 .greenbar
 .devnotes
+.rubocop-*

.rubocop.yml

@@ -1,13 +1,12 @@
+# Please keep AllCops, Bundler, Style, Metrics groups and then order cops
+# alphabetically
+inherit_from:
+  - https://raw.githubusercontent.com/hanami/hanami/master/.rubocop.yml
 AllCops:
-  DisplayCopNames: true
-  DisplayStyleGuide: true
-  ExtraDetails: false
   Exclude:
     - 'vendor/**/*'
     - 'lib/hanami/assets/compressors/*'
     - 'test/fixtures/**/*.gemspec'
-Metrics/LineLength:
-  Enabled: false
 Style/RaiseArgs:
   Enabled: false
 Style/WhileUntilModifier:

bin/hanami-assets

@@ -14,7 +14,7 @@ end.parse!
 
 config = options.fetch(:config) { raise ArgumentError.new('You must specify a configuration file') }
 config = Pathname.new(config)
-config.exist? or raise ArgumentError.new("Cannot find configuration file: #{config}") # rubocop:disable Style/AndOr
+config.exist? or raise ArgumentError.new("Cannot find configuration file: #{config}")
 
 require 'hanami/assets'
 load config