[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:

  6c9d034... coverage: Build gidl-bindings
  0ad93d0... ci: Add .gitlab-ci.yml
  5d42259... ci: Add ubuntu:16.04 run with gcc
  92d539e... ci: Add ubuntu:18.04 run with gcc
  81c4404... ci: Add fedora:latest run with clang
  09fdfa0... ci: Add archlinux/base:latest run with gcc
  c3222cb... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  afcae40... ci: Always deploy

Commits added to the branch:

  762887d... vala: Handle unlock() statement in CodeWriter (*)
  dfc814c... vala: Handle all ctors and dtors in CodeWriter (*)
  795e321... codegen: Avoid critical trying to serialize an unsupported  (*)
  f9c688a... tests: Add "switch enum" test to increase coverage (*)
  2ab3b67... tests: Add "local clash with implicit this" test to increas (*)
  21900b6... codegen: Don't free value if property setter takes ownershi (*)
  41dde20... coverage: Build gidl-bindings
  417ac83... ci: Add .gitlab-ci.yml
  036e718... ci: Add ubuntu:16.04 run with gcc
  28e8bca... ci: Add ubuntu:18.04 run with gcc
  e23a0b6... ci: Add fedora:latest run with clang
  65c19d2... ci: Add archlinux/base:latest run with gcc
  b8bbe00... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  e826291... ci: Always deploy

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