Removed alert, fixed issue with opt.expires wrongly being increased
Removed alert, fixed issue with opt.expires wrongly being increased

jeremydurham/persist-js,mayanks/persist-js,mjpizz/persist-js,mayanks/persist-js,mjpizz/persist-js,igauravsehrawat/persist-js,igauravsehrawat/persist-js,jeremydurham/persist-js,igauravsehrawat/persist-js,jeremydurham/persist-js