Hello, After the upgrade from 4.0.5 to 4.0.6-rc.1 data attributes like data-placeholder, minimum-input-length etc not working. [As per 4.0.5 JSBin](http://jsbin.com/rijowixeha/1/edit?html,js,output) [As per 4.0.6-rc.1 JSBin](http://jsbin.com/hijuzetede/2/edit?html,js,output) As far as I have checked it seem it is due to change in cache of data property using [Utils.GetData](https://github.com/select2/select2/commit/62c4f6332bb90c9d6013e97a0a97ec6bcd0a83df#diff-d119a26bbb794be11c185e398ebe578e) P.S. Creating issue for the first time in this repository, Please Pardon me if I have missed anything special to mention here.