I don't recall that it was ever possible to do that without the use of third party software acting as a bridge. As of 1 July, Microsoft turned off all old Skype cient versions and the current ones do not have the APIs for other software to interface with them.
ippi.com have/had a bridge which had worked for me some time in the past but I had no success with it the last time I tried to do some "experiments" earlier this year.