git subrepo pull packages/Catch2

subrepo:
  subdir:   "packages/Catch2"
  merged:   "fb4153e05"
upstream:
  origin:   "git@github.com:catchorg/Catch2.git"
  branch:   "devel"
  commit:   "fb4153e05"
git-subrepo:
  version:  "0.4.3"
  origin:   "git@github.com:ingydotnet/git-subrepo.git"
  commit:   "2f68596"