[vala] (31 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:

  90620c9... coverage: Build gidl-bindings
  4e922fd... ci: Add .gitlab-ci.yml
  32839e1... ci: Add ubuntu:16.04 run with gcc
  e7ce7b1... ci: Add ubuntu:18.04 run with gcc
  5a43027... ci: Add fedora:latest run with clang
  f8b988e... ci: Add archlinux/base:latest run with gcc
  1eae83d... ci: Always deploy

Commits added to the branch:

  465be97... Bump version suffix to 0.48 (*)
  f9acb47... codegen: Move a bunch of methods to static functions (*)
  5182ac2... codegen: Move type-argument checks to SemanticAnalyzer (*)
  72061ee... vala: Warn when directly accessing member of silent cast-ex (*)
  b4ad44e... vala: Add package_name to missing member error for external (*)
  fc246aa... vala: Allow to override virtual interface implementations (*)
  34f49f4... vala: Perform stricter compatibility check for delegates (*)
  9a0cc13... gstreamer: Update from 1.17.0+ git master (*)
  7a1f0b3... gtk4: Update to 3.96.0+bcea9652 (*)
  469d043... gtk4: Constructors of Gtk.MediaFile needs to be static func (*)
  7d317eb... vala: Let methods return an unowned reference to internal c (*)
  4ed61d4... vala: Let DataType.get_return_type() return an unowned refe (*)
  2b00c99... vala: Return unowned references of internal helper symbols (*)
  061c02a... vala: Rename DataType.data_type property to DataType.type_s (*)
  a6bdd4c... codegen: Follow rename of DataType data_type property to ty (*)
  72b187a... valadoc: Follow rename of DataType data_type property to ty (*)
  7f40ed8... vala: Micro optimizations for SemanticAnalyzer (*)
  1618e76... vala: Micro optimizations for MethodCall (*)
  740b5db... vala: Micro optimizations for MemberAccess (*)
  2be23ae... vala: Micro optimizations for Assignment (*)
  29a3cae... vala: Unify backing symbol instance of data-types (*)
  f01dde8... vala: Move common implementations to CallableType (*)
  325c81d... vala: Drop DelegateType.to_qualified_string() which is dupl (*)
  9811ebe... vala: Micro optimizations (*)
  cd89402... coverage: Build gidl-bindings
  b944a24... ci: Add .gitlab-ci.yml
  d5a05f9... ci: Add ubuntu:16.04 run with gcc
  85af411... ci: Add ubuntu:18.04 run with gcc
  0c8171f... ci: Add fedora:latest run with clang
  7a9df36... ci: Add archlinux/base:latest run with gcc
  05f9602... ci: Always deploy

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