shrine

Pull request #1496: Feature/SHRINE2020 1616

Merge in SHRINE/shrine from feature/SHRINE2020-1616 to feature/SHRINE2020-1218-cats-effect-upgrade

* commit '5f4fd276d4e8346c8b5f553ebc232d48481c83b6':
  Getting this ready for review for SHRINE2020-1616
  Fixed one of the header bits for SHRINE2020-1616
  Got tests compiling but help with SHRINE2020-1616
  Made some progress on commons/auth, then asked for help with SHRINE2020-1616
  Got Auth* compiling for SHRINE2020-1616