Incorrect implementation of `ResultSet.update`

[Losses]

Since disableFreeze is defined in Collection, but not in ResultSet: https://github.com/techfort/LokiJS/blob/master/src/lokijs.js#L5064

But the member is used in ResultSet: https://github.com/techfort/LokiJS/blob/master/src/lokijs.js#L3894

This will always return false.