root,roofit: bump version + new Reflex replacement

New Reflex replacement: https://hypernews.cern.ch/HyperNews/CMS/get/sw-develtools/1946.html

Hash: 18c9b126d9cd6b01cb33c9def77c48392f05f06f

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>