Bootstrap 4 is still in alpha phase and the only level of support for it is out Bootstrap theme. You can find more information about it in these resources: Preview: Bootstrap 4 Sass Theme
and Bootstrap v4 Integration for Kendo UI Widgets
As to jQuery 3.1.1 support: The Kendo UI does not officially support jQuery 3.*, still, it is on our To-Do list and our team is already working on this. You can track the progress at:
Also, the officially supported and recommended versions of jQuery for the specific Kendo UI version can be found at:
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