Microsoft has earlier pushed this update to the Fast Ring Users but now it is available to the Release Preview Ring too.
The version of the SkypePreview proceeds to 11.8.190. With this update, users can now send SMS messages to other phone numbers directly from Skype, rather than using the phone’s regular SMS app. To enable the feature users must head into Skype Preview setting and enable SMS sync (listed below Privacy). Users can also select how far back the syncing should go with Last month, Last year, and Any time as options.
Download the update now,