Are there plans for a minor or bugfix update for Core
There will be minor updates if there are bugs in need of fixing tat can't just wait for the next major version. There are currently no plans for a minor release, but there may still be one as bugs are found and fixed.
or is the next version going to be 0.17?
The next major version will be 0.17 (or 17.0, depending on whether we change the version scheme). That does not necessarily mean that it will be the next version released.