message: age: Note SSH refactor in changelog
  The changelog will need _significant_ updates once the refactoring is
  complete, to cover all facets, but this helps people looking at the main
  repository to track what is going on.
diff: @@ -30,6 +30,7 @@ to 1.0.0 are beta releases.
  `Decryptor::new(ArmoredReader::new(input))` to handle age files that are
  potentially armored.
  - `age::Format` has been moved to `age::armor::Format`.
  +- SSH support has been moved into the `age::ssh` module.
  - OpenSSH `ssh-rsa` keys are now supported without the `unstable` feature flag.
  ## [0.4.0] - 2020-03-25
  