[vala] (11 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:

  ddf0ab8... ci: Add .gitlab-ci.yml
  63aa21e... ci: Always deploy
  5113d2e... ci: Add ubuntu lts 16.04 run with gcc
  f7ff512... ci: Build and deploy API documentation
  127565c... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i

Commits added to the branch:

  4b00344... tests: Add some invalid "array slice" tests to increase cov (*)
  12957d1... tests: Add a field starting with a digit test (*)
  230cd35... tests: Add more invalid "assignment" tests to increase cove (*)
  7584b13... ccode: Rename CCodeFeatureTestMacro to CCodeDefine and gene (*)
  9a9ffd7... codegen: Move get_type_signature() to DataType (*)
  5baacba... codegen: Move try_cast_variant_to_type() to GVariantModule. (*)
  04d70bc... ci: Add .gitlab-ci.yml
  931fb31... ci: Always deploy
  37eabbf... ci: Add ubuntu lts 16.04 run with gcc
  a3486ab... ci: Build and deploy API documentation
  602d1b9... Use Fedora 29 -- https://bugzilla.redhat.com/show_bug.cgi?i

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