[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:

  4990b8d... coverage: Build gidl-bindings
  d35262f... ci: Add .gitlab-ci.yml
  ec3585c... ci: Add ubuntu:16.04 run with gcc
  04be94f... ci: Add archlinux:latest run with gcc
  62ed023... ci: Add alpine:edge run with gcc
  2e3269d... ci: Add fedora:rawhide run with clang
  39f2f72... Fedora rawhide is broken
  ecda233... ci: Use Fedora 34 (broken DBus)
  3edd728... Ubuntu devel is broken
  8a85c83... Alpine edge is broken
  a1aede3... ci: Build manual as pdf and html
  dd1a0f1... ci: Always deploy

Commits added to the branch:

  af730d4... vala: Don't allow casting real structs to classes or simple (*)
  6d61901... gdbus: Use g_dbus_method_invocation_take_error() as simplif (*)
  7ab0a8e... glib-2.0: Update 2.72 symbols (*)
  9dff977... vapi: Update GIR-based bindings (*)
  5b6345a... codegen: Add and use CCodeConstantIdentifier for accessing  (*)
  16840d2... vala: Check for unavailable value-type of variable initiali (*)
  2ca3619... coverage: Build gidl-bindings
  807789c... ci: Add .gitlab-ci.yml
  2372f85... ci: Add ubuntu:16.04 run with gcc
  d2f1789... ci: Add archlinux:latest run with gcc
  ab8074e... ci: Add alpine:edge run with gcc
  695d4f2... ci: Add fedora:rawhide run with clang
  0c7a43c... Fedora rawhide is broken
  d5f1f3f... ci: Use Fedora 34 (broken DBus)
  cf70cfe... Ubuntu devel is broken
  3ed27ca... Alpine edge is broken
  f25d2a4... ci: Build manual as pdf and html
  fdaa351... ci: Always deploy

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