v1.16.2

Fixed

• Added missing translation keys
• Fix issue where a cookie value could be set more than once when interacting
  with the httponly option

Changed

• Remove Rails as a dependency so that clearance does not trigger a cascade of
  requirements as rails pulls in every framework. Instead, depend on just the
  frameworks relevant to Clearance.
• Prevent Clearance::BackDoor from being used outside the "test" environment.

Full changelog