fixup! [Fix rubocop#1410] Make registered cops aware of AllCops: MigratedSchemaVersion

Author: koic

lib/rubocop/rails/migration_file_skippable.rb

@@ -38,7 +38,7 @@ def self.apply_to_cops!
       def already_migrated_file?
         return false unless migrated_schema_version
 
-        match_data = File.basename(processed_source.file_path).match(/(?<timestamp>\d{14})/)
+        match_data = File.basename(processed_source.file_path).match(%r|migrate/*/*(?<timestamp>\d{14})|)
         schema_version = match_data['timestamp'] if match_data
 
         return false unless schema_version