[vala] (18 commits) Non-fast-forward update to branch wip/ci

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/ci' 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:

  e1b95fb... coverage: Build gidl-bindings
  7de1c11... ci: Add .gitlab-ci.yml
  8ebf609... ci: Add ubuntu:16.04 run with gcc
  205a711... ci: Add ubuntu:18.04 run with gcc
  0e99da5... ci: Add fedora:rawhide run with clang
  1371768... ci: Add archlinux/base:latest run with gcc
  be6eec3... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  4f2b5b4... ci: Always deploy

Commits added to the branch:

  6871af9... gtk4: Update to 3.98.5+4da3edd4 (*)
  d825304... gstreamer: Update from 1.17.2+ git master (*)
  29e6a79... vala: Improve check of expression passed to yield (*)
  29052f8... glib-2.0: Drop type_id from GLib.Error, let it be handled i (*)
  8ac5339... girwriter: Add c:identifier-prefixes to <namespace> (*)
  d8fd30f... girwriter: Write c:type="void" when name="none" (*)
  ef9c592... girwriter: Write c:symbol-prefix on supported elements (*)
  5cc96a5... tests: Add "access vfunc pointer" test to increase coverage (*)
  168310d... vala: Allow prototype access to signal with emitter (*)
  4818502... vala: Mark with-statements as experimental (*)
  84d6ee1... coverage: Build gidl-bindings
  6a270fc... ci: Add .gitlab-ci.yml
  af2b39c... ci: Add ubuntu:16.04 run with gcc
  3fc5f61... ci: Add ubuntu:18.04 run with gcc
  859de1e... ci: Add fedora:rawhide run with clang
  70b3ecf... ci: Add archlinux/base:latest run with gcc
  dea27be... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  e584980... ci: Always deploy

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