rails.yml in rubocop-govuk-3.3.0

- old
+ new

@@ -6,9 +6,10 @@
 require: rubocop-rails
 
 AllCops:
   Exclude:
     - 'db/schema.rb'
+    - 'db/migrate/201*'
 
 Rails:
   Enabled: true
 
 Rails/ActionFilter: