Replace raw string where clause with query methods

Should effectively be the same query but easier to read and with the benefit of ActiveRecord's type casting and association reflection. Fixes issue dealing with mutiple id column types

lib/audited/auditor.rb

@@ -177,9 +177,8 @@ def audited_attributes
 
       # Returns a list combined of record audits and associated audits.
       def own_and_associated_audits
-        Audited.audit_class.unscoped
-          .where("(auditable_type = :type AND auditable_id = :id) OR (associated_type = :type AND associated_id = :id)",
-            type: self.class.base_class.name, id: id)
+        Audited.audit_class.unscoped.where(auditable: self)
+          .or(Audited.audit_class.unscoped.where(associated: self))
           .order(created_at: :desc)
       end