[vala] (20 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:

  6f45e55... ci: Add .gitlab-ci.yml
  b48715e... ci: Always deploy
  a29bf03... ci: Add ubuntu lts 16.04 run with gcc
  d14401e... ci: Build and deploy API documentation
  6aade41... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i

Commits added to the branch:

  0675eb1... codegen: Make sure to call a corresponding pop_context() (*)
  7612235... codegen: Make sure to call a corresponding pop_line() (*)
  14fb293... codegen: Make sure to call a corresponding pop_function() (*)
  153b835... tests: Actually define SkippedStruct as struct for girwrite (*)
  5284e6b... girwriter: Properly write attributes for non-GObject classe (*)
  3f5dc66... girwriter: Don't write c:include tags for symbols from exte (*)
  96c0d9b... girwriter: Populate gir_namespace/version attributes of ext (*)
  bed0291... girwriter: Only replace existing GIR files if they changed (*)
  b9085f2... gtk4: Update to 3.94.0+724ec3ca (*)
  6d63ab1... gstreamer: Update from 1.17.0+ git master (*)
  6c75818... vapi: Update GIR-based bindings (*)
  96e55fe... compiler: Add OptionFlags.NO_ARG to deprecated "--thread" o (*)
  0d0e39b... girwriter: Write implicit parameters and properties for gen (*)
  23a8257... girwriter: Write implicit fields for arrays and delegates (*)
  f06ce70... ci: Add .gitlab-ci.yml
  0363b14... ci: Always deploy
  a480022... ci: Add ubuntu lts 16.04 run with gcc
  c6796b9... ci: Build and deploy API documentation
  6a0b9dd... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i
  143b1b2... ci: Add fedora rawhide run with gcc

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