Next doesn't work right if sibling elements are present that do not match ".step"

[rinogo]

Not enough time to make a proper PR, but I'll post this here in case it helps anyone.

I'm hiding steps in my backend code by changing the class on a step from .step to .hidden-step. This works great, but navigating with the "Next" button causes the plugin to attempt to show our .hidden-step element instead of skipping it and showing the next .step element.

Here's the fix. Make the change to the _navigate() function:

// var step1 =  this.steps.filter("#" + step).next().attr("id"); //Original, gets next sibling (regardless of what it is!).
var step1 =  this.steps.filter("#" + step).nextAll(".step").first().attr("id"); //Fixed by rinogo, 11/27/17, gets next ".step"

[husnain-aslam]

Update jQuery Validation and jQuery UI to latest versions.