Place sorting arrows to immediate right of label - with Bootstrap 4?

I'm using DataTables with Bootstrap 4
http://live.datatables.net/kifuguti/1/edit

and want to place sorting arrows to immediate right of label.

Googled and found some related articles, for example:

https://www.datatables.net/forums/discussion/25819/place-sort-icon-to-immediate-right-of-label
https://stackoverflow.com/questions/28575810/jquery-datatables-left-align-sort-icon
https://stackoverflow.com/questions/41383641/is-there-any-way-to-display-sorting-icon-next-to-the-header-text-in-jquery-datat

However, it seems these solutions don't work with Bootstrap version of DataTables (the way Datatables puts arrows is different).
Is there a good solution with Bootstrap version of DataTables?