Release version 1!0.4.0

Shortlog of commits since last release:

    Brian Bouterse (2):
          Updates pulp-smash for repo layout changes
          Introduce BASE_CONTENT_GUARD_PATH

    Bruno Rocha (8):
          Add `download_content_unit` helper function for Pulp 3
          Adds `RegistryClient` to talk woth container registries.
          Fic certguard endpoint
          add kwargs to download_content_unit function
          Add `ensure_teardownclass` context manager to pulp_smash.utils
          Add api.task_handler and related Client.using_handler
          Add 'pulp-smash shell' command.
          Lazy load the cli.Client machine

    Daniel Alley (1):
          Update get_artifact_paths() to be more correct

    koliveir (4):
          Remove constant USER_PATH
          Add lazy download policies constant
          Overhaul CI and apply code format
          Update documentation about task_handler

VERSION

@@ -1 +1 @@
-1!0.3.0
+1!0.4.0