This is not a feature that is coming in any of the plugins very soon, though if you can convert .ics to a format that we do have import support for already, like .csv, that might be a workable solution for now. Do you think it would be? If so, check out converter sites like this one → https://icsconvert.appspot.com/
Let me know if this helps, or if you have any follow-up questions or comments here!