rubocop corrections

app/models/application_record.rb

@@ -1,23 +1,28 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
   def update(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'update', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'update', params: to_json)
     result
   end
+
   def save(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'save', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'save', params: to_json)
     result
   end
+
   def self.create(*args)
     result = super(*args)
     AuditRecord.create(model: self.class, action: 'create', params: result.to_json)
     result
   end
+
   def decrement!(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'decrement!', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'decrement!', params: to_json)
     result
   end
 end