style(rubocop): fix all safe auto correctable offenses

app/models/application_record.rb

@@ -1,5 +1,7 @@
 class ApplicationRecord < ActiveRecord::Base
+
   self.abstract_class = true
-  self.inheritance_column = 'sti_type'
+  self.inheritance_column = "sti_type"
   nilify_blanks
+
 end