Avoid calling Object.prototype methods directly on object instances

lib/utils/date-wrapper.js

@@ -25,7 +25,7 @@ function wrapDates (originalQuery, fields) {
  * @param {object} field
  */
 function _isDateType (field) {
-    return DATE_OIDS.hasOwnProperty(field.dataTypeID);
+    return Object.prototype.hasOwnProperty.call(DATE_OIDS, field.dataTypeID);
 }
 
 /**