[libsecret] (15 commits) Non-fast-forward update to branch wip/dueno/backend

[Daiki Ueno <dueno src gnome org>]

The branch 'wip/dueno/backend' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  d6a870a... secret-service: Move parent property setting to constructor
  4a3357a... secret-backend: New interface to represent password storage
  d0d1b8e... secret-service: Implement SecretBackendInterface
  efe11f2... secret-backend: Add a way to uncache singleton instance
  b13bea1... secret-password: Port to SecretBackend interface
  0fe56cc... secret-password: Add necessary gir annotations
  b1351f0... build: Properly expose backend vfuncs to vapi

Commits added to the branch:

  be541cf... Release 0.19.0 (*)
  aae0329... service: Fix secret_service_ensure_session_finish error pro (*)
  75db38c... Merge branch 'fix-hang' into 'master' (*)
  f576dfb... Release 0.19.1 (*)
  c4fb5f0... build: Fix FTBFS using meson without valgrind (*)
  67680a6... Merge branch 'ftbfs-meson-wo-valgrind' into 'master' (*)
  2651abd... README.md: Mention the new versioning scheme [ci skip] (*)
  616a967... Merge branch 'wip/dueno/versioning' into 'master' (*)
  e645669... secret-service: Move parent property setting to constructor
  a0d1059... secret-backend: New interface to represent password storage
  71a19a9... secret-service: Implement SecretBackendInterface
  b37d2b8... secret-backend: Add a way to uncache singleton instance
  49e6e0c... secret-password: Port to SecretBackend interface
  0600619... secret-password: Add necessary gir annotations
  a631735... build: Properly expose backend vfuncs to vapi

(*) This commit already existed in another branch; no separate mail sent