[packagekit] PackageKit 1.2.0

[Richard Hughes]

Version 1.2.0
~~~~~~~~~~~~~
Released: 2020-05-04

Backends:
 - alpm: Fix assertion failures for download start signals (Felix Yan)
 - alpm: Fix config parsing for DisableDownloadTimeout (Felix Yan)
 - alpm: Handle blank target name for progress cb (Carson Black)
 - alpm: Improve dlcb handling (Carson Black)
 - alpm: Respect ignored packages on update (#390) (jan Pontaoski)
 - alpm: Sync with the latest libalpm (Dominik Opyd)
 - alpm: Updates-changed implementation (Carson Black)
 - alpm: Use separate alpm_handle_t for updates (Carson Black)
 - aptcc: Add libutil to linker args (David Hewitt)
 - aptcc: Do not emit PK_ERROR_ENUM_GPG_FAILURE (Julian Andres Klode)
 - aptcc: Include helper socket/service when making release tarball
(Matthias Klumpp)
 - aptcc: Only report errors if there are errors (Julian Andres Klode)
 - aptcc: Set locale env vars properly according to frontend request
(Matthias Klumpp)
 - aptcc: Use pk_backend_convert_uri on proxy settings (David Hewitt)
 - dnf: Load all the repos and vars directories (Neal Gompa)
 - Make pk_alpm_update_database a nullop without force (Carson Black)
 - pisi: Remove unmaintained backend (Richard Hughes)
 - ports: Remove unmaintained backend (Richard Hughes)
 - urpmi: Remove unmaintained backend (Richard Hughes)
 - yum: Remove unmaintained backend (Richard Hughes)
 - zypp: Ignore already installed package when installing (Jonathan Kang)
 - zypp: Remove upgrade-system implementation (Jonathan Kang)

New Features:
 - Port to the meson build system (Corentin Noël and many others)
 - Remove the GTK2 gtk-module support (Richard Hughes)

Bugfixes:
 - Do not do failable actions in the PkDbus constructor (Richard Hughes)
 - Do not do failable actions in the PkTransaction constructor (Richard Hughes)
 - Revert "Shutdown the daemon on idle by default" (Michael Catanzaro)

Richard