[vala] (14 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:

  c313f76... coverage: Build gidl-bindings
  8a125ff... ci: Add .gitlab-ci.yml
  4b6194b... ci: Add ubuntu:16.04 run with gcc
  b6d6d35... ci: Add archlinux:latest run with gcc
  bc82149... ci: Add alpine:edge run with gcc
  dc5c569... ci: Add fedora:rawhide run with clang
  139cb7b... Ubuntu devel is broken
  e1fabca... ci: Use Fedora 34 (broken DBus)
  9a2ff35... ci: Build manual as pdf and html
  746e6d3... ci: Always deploy

Commits added to the branch:

  6d80e07... gstreamer: Update from 1.21+ git main (*)
  0e822df... vapi: Update GIR-based bindings (*)
  53b003b... vala: Don't allow nullable enum value as real GObject prope (*)
  f56bbc7... vala: Improve accessibility check inside member initializer (*)
  d61821e... coverage: Build gidl-bindings
  0a0c730... ci: Add .gitlab-ci.yml
  f7037d5... ci: Add ubuntu:16.04 run with gcc
  c6426c0... ci: Add archlinux:latest run with gcc
  cac3568... ci: Add alpine:edge run with gcc
  f30b3e9... ci: Add fedora:rawhide run with clang
  a4f7a1a... Ubuntu devel is broken
  1caeeba... ci: Use Fedora 34 (broken DBus)
  bf3c3d4... ci: Build manual as pdf and html
  fdbf125... ci: Always deploy

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